Gf - Hy
| Ginkgo biloba | Ginkgo Zweilappiger | Ginkgo Tree | Ginkgoaceae |
| Gladiolus anatolicus | Gladiole Türkische | Anatolian Gladiolus | Iridaceae |
| Gladiolus communis | Gladiole Gewöhnliche | Common Gladiolus | Iridaceae |
| Gladiolus dubius | Gladiole Zweifelhafte | Doubtful Gladiolus | Iridaceae |
| Gladiolus gallaecicus | Gladiole Galizische | Galician Gladiolus | Iridaceae |
| Gladiolus illyricus | Gladiole Illyrische | Common Gladiolus | Iridaceae |
| Gladiolus imbricatus | Gladiole Wiesen | Turkish Marsh Gladiolus | Iridaceae |
| Gladiolus italicus | Gladiole Italienische | Italian Gladiolus | Iridaceae |
| Gladiolus kotschyanus | Gladiole Kotschys | Kotschy's Gladiolus | Iridaceae |
| Gladiolus palustris | Gladiole Sumpf | Marsh Gladiolus | Iridaceae |
| Gladiolus tristis | Gladiole Eintönige | Ever- flowering Gladiolus | Iridaceae |
| Gladiolus x byzaninus | Gladiole Byzantinische | Byzantine Gladiolus | Iridaceae |
| Gladiolus x hortulanus | Gladiole Garten | Darden Gladiolus | Iridaceae |
| Gladiolus x sulistrovicus | Gladiole Sulistrowicer | Sulistrowician Gladiolus | Iridaceae |
| Glandora diffusa | Steinsame Blauer | Purple Gromwell | Boraginaceae |
| Glandora nitida | Steinsame Glänzender | Glossy Gromwell | Boraginaceae |
| Glandora oleifolia | Steinsame Olivenblättriger | Olive-leaved Gromwell | Boraginaceae |
| Glandora prostrata | Steinsame Niederliegender | Prostrate Gromwell | Boraginaceae |
| Glandora rosmarinifolia | Steinsame Rosmarinblättriger | Rosemary-leaved Gromwell | Boraginaceae |
| Glandularia aristigera | Drüseneisenkraut Schmalfiedriges | Mock Vervain |
Verbenaceae |
| Glaucium corniculatum | Hornmohn Roter | Blackspot Hornpoppy | Papaveraceae |
| Glaucium flavum | Hornmohn Gelber | Yellow Hornpoppy | Papaveraceae |
| Glebionis coronaria | Wucherblume Kronen | Crown Daisy | Asteraceae |
| Glebionis segetum | Wucherblume Saat | Corn Marigold | Asteraceae |
| Glechoma hederaceae | Gundermann Efeu | Common Ground- Ivy | Lamiaceae |
| Glechoma hirsuta | Gundermann Behaarter | Hairy Ground- Ivy | Lamiaceae |
| Gleditsia triacanthos | Gleditschie Amerikanische | American Honey- Locust | Caesalpinaceae |
| Globularia alypum | Kugelblume Strauchige | Shrubby Globularia | Plantaginaceae |
| Globularia bisnagarica | Kugelblume Gewöhnliche | Common Globularia | Plantaginaceae |
| Globularia cordifolia | Kugelblume Herzblättrige | Heart- leaved Globularia | Plantaginaceae |
| Globularia fuxeensis | Kugelblume Foix | Foix Globularia | Plantaginaceae |
| Globularia incanescens | Kugelblume Aschgraue | Appenine Globularia | Plantaginaceae |
| Globularia linifolia | Kugelblume Leinblättrige | Flax- leved Globularia | Plantaginaceae |
| Globularia majoricensis | Kugelblume Mallorquiner | Majorcan Globularia | Plantaginaceae |
| Globularia nudicaulis | Kugelblume Nacktstängelige | Leafless- stemmed Globularia | Plantaginaceae |
| Globularia repens | Kugelblume Kriechende | Creeping Globularia | Plantaginaceae |
| Globularia spinosa | Kugelblume Dornige | Spiny Globularia | Plantaginaceae |
| Globularia stygia | Kugelblume Stygische | Stygian Globularia | Plantaginaceae |
| Globularia vulgaris | Kugelblume Gewöhnliche | Common Globularia | Plantaginaceae |
| Glossopappus macrotus | Wucherblume Großohrige | Large- eared Marigold | Asteraceae |
| Glyceria declinata | Schwaden Blaugrüner | Waxy Mannagrass | Poaceae |
| Glyceria fluitans | Schwaden Flutender | Water Mannagrass | Poaceae |
| Glyceria maxima | Schwaden Wasser | Reed Mannagrass | Poaceae |
| Glyceria nemoralis | Schwaden Hain | Wood Mannagrass | Poaceae |
| Glyceria notata | Schwaden Falt | Plicate Mannagrass | Poaceae |
| Glyceria striata | Schwaden Gestreifter | Fowl Mannagrass | Poaceae |
| Glycine max | Sojabohne | Soybean | Fabaceae |
| Glycyrrhiza echinata | Süßholz Römisches | German Liquorice | Fabaceae |
| Glycyrrhiza foetida | Süßholz Stinkendes | Stinking Liquorice | Fabaceae |
| Glycyrrhiza glabra | Süßholz Kahles | Common Liquorice | Fabaceae |
| Gnaphalium hoppeanum | Ruhrkraut Hoppes | Hoppe's Cudweed | Asteraceae |
| Gnaphalium norvegicum | Ruhrkraut Norwegisches | Highland Cudweed | Asteraceae |
| Gnaphalium roeseri | Ruhrkraut Rösers | Roeser's Cudweed | Asteraceae |
| Gnaphalium supinum | Ruhrkraut Zwerg | Dwarf Cudweed | Asteraceae |
| Gnapahlium sylvaticum | Ruhrkraut Wald | Heath Cudweed | Asteraceae |
| Gnapahlium uliginosum | Ruhrkraut Sumpf | Marsh Cudweed | Asteraceae |
| Gomphocarpus fruticosus | Seidenpflanze Baumwoll | Giant Swan Milkweed | Apocynaceae |
| Gomphocarpus physocarpus | Seidenpflanze Breitlaubige | Hairy Balls | Apocynaceae |
| Gomphrena globosa | Kugelamaranth Echter | Common Globe Amaranth | Amaranthaceae |
| Goniolimon tataricum | Meerlavendel Tatarischer | German Statice | Plumbaginaceae |
| Goodyera repens | Netzblatt Kriechendes | Creeping Lady's Tresses | Orchidaceae |
| Gossypium arboreum | Baumwollstrauch Baumförmiger | Tree Cotton | Malvaceae |
| Gossypium barbadense | Baumwollstrauch Hochland | Creole Cotton | Malvaceae |
| Gossypium herbaceum | Baumwollstrauch Krautiger | Levant Cotton | Malvaceae |
| Gossypium hirsutum | Baumwollstrauch Behaarter | Upland Cotton | Malvaceae |
| Grafia golaka | Kerndolde Krainer | Southern Ribseed | Apiaceae |
| Gratiola linifolia | Gnadenkraut Leinblättriges | Flax- leaved Hedge- Hysop | Plantaginaceae |
| Gratiola neglecta | Gnadenkraut Übersehenes | Clammy Hedge- Hysop | Plantaginaceae |
| Gratiola officinalis | Gnadenkraut Gottes | Common Hedge- Hysop | Plantaginaceae |
| Grindelia squarrosa | Gummikraut Sparriges | Curlytop Gumweed | Asteraceae |
| Groenlandia densa | Fischkraut Dichtes | Opposite Leaved Pondweed | Potamogetonaceae |
| Guillonea scabra | Guillonea Raue | Rough Guillonea | Apiaceae |
| Guizotia abyssinica | Ramtillkraut Abessinisches | Niger Seed | Asteraceae |
| Gymnadenia conopsea | Händelwurz Große | Common Fragrant Orchid | Orchidaceae |
| Gymnadenia frivaldii | Händelwurz Friwalds | Friwald's Orchid | Orchidaceae |
| Gymnadenia odoratissima | Händelwurz Wohlriechende | Short- spurred Fragrant Orchid | Orchidaceae |
| Gymnigritella x heufleri | Gymnigritelle Heuflers | Heufler's Gymnigritella | Orchidaceae |
| Gymnigritella x suaveolens | Gymnigritelle Wohlriechende | Fragrant Gymnigritella | Orchidaceae |
| Gymnocarpium dryopteris | Eichenfarn | Western Oak Fern | Woodsiaceae |
| Gymnocarpium robertianum | Ruprechtsfarn | Scented Oak Fern | Woodsiaceae |
| Gymnospermium maloi | Gymnospermium Malos | Malo's Gymnospermium | Berberidaceae |
| Gymnospermium peloponnesiacum | Gymnospermium Peloponnesisches | Peloponnesian Gymnospermium | Berberidaceae |
| Gymnospermium scipetarum | Gymnospermium Skipetaren | Albanian Gymnospermium | Berberidaceae |
| Gymnosporia senegalensis ssp. europaea | Spitzdorn Europäischer | European Spikethorn | Phyllanthaceae |
| Gypsophila arrostii | Gipskraut Arrostos | Arrosto's Baby's Breath | Caryophyllaceae |
| Gypsophila bermejoi | Gipskraut Bermejos | Bermejo's Baby's Breath | Caryophyllaceae |
| Gypsophila confertifolia | Gipskraut Rhodisches | Rhodian Baby's Breath | Caryophyllaceae |
| Gypsophila elegans | Gipskraut Elegantes | Showy Baby's Breath | Caryophyllaceae |
| Gypsophila fastigiata | Gipskraut Büschel | Fastigiate Baby's Breath | Caryophyllaceae |
| Gypsophila macedonica | Gipskraut Mazedonisches | Macedonian Baby's Breath | Caryophyllaceae |
| Gypsophila montserratii | Gipskraut Montserrat | Montserrat Baby's Breath | Caryophyllaceae |
| Gypsophila muralis | Gipskraut Mauer | Low Baby's Breath | Caryophyllaceae |
| Gypsophila nana | Gipskraut Zwerg | Dwarf Baby's Breath | Caryophyllaceae |
| Gypsophila pallasii | Gipskraut Pallas' | Pallas's Baby's Breath | Caryophyllaceae |
| Gypsophila paniculata | Gipskraut Rispen | Paniculate Baby's Breath | Caryophyllaceae |
| Gypsophila papillosa | Gipskraut Warziges | Papillose Baby's Breath | Caryophyllaceae |
| Gypsophila perfoliata | Gipskraut Durchwachsenblättriges | Perfoliate Baby's Breath | Caryophyllaceae |
| Gypsophila pilosa | Gipskraut Behaartes | Turkish Baby's Breath | Caryophyllaceae |
| Gypsophila repens | Gipskraut Kriechendes | Creeping Baby's Breath | Caryophyllaceae |
| Gypsophila scorzonerifolia | Gipskraut Schwarzwurzelblättriges | Glandular Baby's Breath | Caryophyllaceae |
| Gypsophila struthium | Gipskraut Strauß | Ostrich Baby's Breath | Caryophyllaceae |
| Gypsophila tomentosa | Gipskraut Filziges | Tomentose Baby's Breath | Caryophyllaceae |
| Gypsophila vaccaria | Kuhnelke Saat |
Spanish Cowherb | Caryophyllaceae |
| Haberla rhodopensis | Rhodopeglocke Echte | Rhodope Haberlea | Gesneriaceae |
| Hablitzia tamnoides | Rankspinat Kaukasischer | Caucasian Spinach | Chenopodiaceae |
| Hacquetia epipactis | Schaftdolde Grüne | Dwarf Masterwort | Apiaceae |
| Halacsya sendtneri | Halacsya Sendtners | Sendtner's Halacsya | Boraginaceae |
| Halimium atriplicifolium | Zistrose Meldenblättrige | Atriplex- leaved Rockrose | Cistaceae |
| Halimium calycinum | Zistrose Kelch | Calyx Rockrose | Cistaceae |
| Halimium halimifolium | Zistrose Gelbe | Yellow Rockrose | Cistaceae |
| Halimium lasianthum | Zistrose Zottige | Wooly Rockrose | Cistaceae |
| Halimium ocymoides | Zistrose Basilikumblättrige | Basil- leaved Rockrose | Cistaceae |
| Halimium umbellatum | Zistrose Doldige | Umbel- flowered Rockrose | Cistaceae |
| Halimium voldii | Zistrose Volds | Vold's Rockrose | Cistaceae |
| Halocnemum cruciatum | Gliedermelde Kreuzförmige | Cross- shaped Glasswort | Chenopodiaceae |
| Halocnemum strobilaceum | Gliedermelde Kegelförmige | Cone- shaped Glasswort | Chenopodiaceae |
| Halogeton sativus | Salzkraut Saat | Planted Saltwort | Chenopodiaceae |
| Halopeplis amplexicaulis | Salzpeplis Stängelumfassende | Amplexicaul Glasswort | Chenopodiaceae |
| Halophila stipulacea | Breitblättriges Seegras | Broadleaf Seagrass | Hydrocharitaceae |
| Hammada Gegliederte | Jointed Hammada | Chenopodiaceae | |
| Hammarbya paludosa | Weichwurz Sumpf | Bog Orchid | Orchidaceae |
| Knotenfrucht Griechische | Greek Hammatolobium | Fabaceae | |
| Haplophyllum balcanicum | Gilbraute Balkan | Balkan Yellow- Rue | Rutaceae |
| Haplophyllum bastetanum | Gilbraute Grüne | Green Yellow- Rue | Rutaceae |
| Haplophyllum boissieranum | Gilbraute Boissiers | Boissier's Yellow- Rue | Rutaceae |
| Haplophyllum buxbaumii | Gilbraute Buxbaums | Buxbaum's Yellow- Rue | Rutaceae |
| Haplophyllum coronatum | Gilbraute Kronen | Crown Yellow- Rue | Rutaceae |
| Haplophyllum linifolium | Gilbraute Leinblättrige | Flax- leaved Yellow- Rue | Rutaceae |
| Haplophyllum megalanthum | Gilbraute Großblütige | Large- flowered Yellow- Rue | Rutaceae |
| Haplophyllum patavinum | Gilbraute Padua | Padua Yellow- Rue | Rutaceae |
| Haplophyllum rosmarinifolium | Gilbraute Rosmarinblättrige | Rosemary- leaved Yellow- Rue | Rutaceae |
| Haplophyllum suaveolens | Gilbraute Wohlriechende | Fragrant Yellow- Rue | Rutaceae |
| Hedera colchicum | Efeu Kolchischer | Persian Ivy | Araliaceae |
| Hedera helix | Efeu Gewöhnlicher | English Ivy | Araliaceae |
| Hedera hibernica | Efeu Irischer | Irish Ivy | Araliaceae |
| Hedera iberica | Efeu Spanischer | Spanish Ivy | Araliaceae |
| Hedipnois arenaria | Röhrenkraut Sand | Sand Hawkbit | Asteraceae |
| Hedipnois rhagadioloides | Röhrenkraut Kretisches | Cretan Hawkbit | Asteraceae |
| Hedychium gardnerianum | Schmetterlingsingwer Kahili | Kahili Ginger | Ziniberaceae |
| Hedysarum boutignyanum | Süßklee Boutignys | Boutigny's Alpine Sainfoin | Fabaceae |
| Hedysarum boveanum | Süßklee Bovés | Bové's Alpine Sainfoin | Fabaceae |
| Hedysarum brigantiacum | Süßklee Briançon | Briançon Sainfoin | Fabaceae |
| Hedysarum coronarium | Süßklee Kronen | Crown Sainfoin | Fabaceae |
| Hedysarum flexuosum | Süßklee Kronen | Crown Sainfoin | Fabaceae |
| Hedysarum glomeratum | Süßklee Knäuel | Clustered Sainfoin | Fabaceae |
| Hedysarum hedysaroides | Süßklee Alpen | Alpine Sainfoin | Fabaceae |
| Hedysarum grandiflorum ssp. bulgaricum | Süßklee Bulgarischer | Bulgarian Sainfoin | Fabaceae |
| Hedysarum macedonicum | Süßklee Mazedonischer | Macedonian Sainfoin | Fabaceae |
| Hedysarum pestalozzae | Süßklee Pestalozzas | Pestalozza's Alpine Sainfoin | Fabaceae |
| Hedysarum spinosissimum | Süßklee Dorniger | Spiny Sainfoin | Fabaceae |
| Helianthemum aegyptiacum | Sonnenröschen Ägyptisches | Egyptian Rock- Rose | Cistaceae |
| Helianthemum allionii | Sonnenröschen Allionis | Allioni's Rock- Rose | Cistaceae |
| Helianthemum almeriense | Sonnenröschen Almeria | Almeria Rock- Rose | Cistaceae |
| Helianthemum alpestre | Sonnenröschen Alpen | Alpine Rock- Rose | Cistaceae |
| Helianthemum alypoides | Sonnenröschen Alypumähnliches | Alypum- like Rock- Rose | Cistaceae |
| Helianthemum angustatum | Sonnenröschen Schmales | Narrow Rock- Rose | Cistaceae |
| Helianthemum apenninum | Sonnenröschen Apenninen | White Rock- Rose | Cistaceae |
| Helianthemum asperum | Sonnenröschen Raues | Rough Rock- Rose | Cistaceae |
| Helianthemum canum | Sonnenröschen Graues | Hoary Rock- Rose | Cistaceae |
| Helianthemum caput- felis | Sonnenröschen Katzenköpfiges | Cat's- head Rock- Rose | Cistaceae |
| Helianthemum cinereum ssp. cinereum | Sonnenröschen Aschgraues | Ash- grey Rock- Rose | Cistaceae |
| Helianthemum cinereum ssp. guadiccianum | Sonnenröschen Guadix | Guadix Rock- Rose | Cistaceae |
| Helianthemum croceum | Sonnenröschen Safrangelbes | Saffron Rock- Rose | Cistaceae |
| Helianthemum dianicum | Sonnenröschen Dianisches | Garden Rock- Rose | Cistaceae |
| Helianthemum fontqueri | Sonnenröschen Font Quers | Font- Quer's Rock- Rose | Cistaceae |
| Helianthemum guerrae | Sonnenröschen Sand | Sand Rock- Rose | Cistaceae |
| Helianthemum hieronymi | Sonnenröschen Hieronymus | Hiernonymus Rock- Rose | Cistaceae |
| Helianthemum hirtum | Sonnenröschen Behaartes | Hairy Rock- Rose | Cistaceae |
| Helianthemum hymettium | Sonnenröschen Hymettos | Hymettos Rock- Rose | Cistaceae |
| Helianthemum italicum | Sonnenröschen Italienisches | Italian Rock- Rose | Cistaceae |
| Helianthemum jonium | Sonnenröschen Ionisches | Ionium Rock- Rose | Cistaceae |
| Helianthemum ledifolium | Sonnenröschen Porstblättriges | Ledum-leaved Rock- Rose | Cistaceae |
| Helianthemum lippii | Sonnenröschen Lippis | Lippi's Rock- Rose | Cistaceae |
| Helianthemum lunulatum | Sonnenröschen Mondfleckiges | Shrubby Rock- Rose | Cistaceae |
| Helianthemum marifolium | Sonnenröschen Marumblättriges | Marum- leaved Rock- Rose | Cistaceae |
| Helianthemum marminorense | Sonnenröschen Mar menor | Mar menor Rock- Rose | Cistaceae |
| Helianthemum neopiliferum | Sonnenröschen Nacktes | Naked Rock- Rose | Cistaceae |
| Helianthemum nummularium | Sonnenröschen Gewöhnliches | Common Rock- Rose | Cistaceae |
| Helianthemum origanifolium | Sonnenröschen Oreganoblättriges | Majoram- leaved Rock- Rose | Cistaceae |
| Helianthemum papillare | Sonnenröschen Warziges | Papillate Rock- Rose | Cistaceae |
| Helianthemum pannosum | Sonnenröschen Lappiges | Lobed Rock- Rose | Cistaceae |
| Helianthemum polygonoides | Sonnenröschen Polygonumähnliches | Knotweed- like Rock- Rose | Cistaceae |
| Helianthemum raynaudii | Sonnenröschen Raynauds | Raynaud's Rock- Rose | Cistaceae |
| Helianthemum rotundifolium | Sonnenröschen Rundblättriges | Round- leaved Rock- Rose | Cistaceae |
| Helianthemum salicifolium | Sonnenröschen Weidenblättriges | Willow- leaved Rock- Rose | Cistaceae |
| Helianthemum sanguineum | Sonnenröschen Blutrotes | Blood Rock- Rose | Cistaceae |
| Helianthemum squamatum | Sonnenröschen Schuppiges | Squamose Rock- Rose | Cistaceae |
| Helianthemum stipulatum | Sonnenröschen Strand | Beach Rock- Rose | Cistaceae |
| Helianthemum syriacum | Sonnenröschen Syrisches | Syrian Rock- Rose | Cistaceae |
| Helianthemum urrielense | Sonnenröschen Urrielu | Mount Urrielu Rock- Rose | Cistaceae |
| Helianthemum viscarium | Sonnenröschen Drüsiges | Glandular Rock- Rose | Cistaceae |
| Helianthemum viscidulum | Sonnenröschen Klebriges | Sticky Rock- Rose | Cistaceae |
| Helianthemum violaceum | Sonnenröschen Behaartes | Hairy Rock- Rose | Cistaceae |
| Helianthemum x cultorum | Sonnenröschen Garten | Garden Rock- Rose | Cistaceae |
| Helianthemum x sulphureum | Sonnenröschen Schwefelgelbes | Sulphur Rock- Rose | Cistaceae |
| Helianthus annuus | Sonnenblume Einjährige | Common Sunflower | Asteraceae |
| Helianthus decapetalus | Sonnenblume Zehnstrahlige | Ten- petaled Sunflower | Asteraceae |
| Helianthus pauciflorus | Sonnenblume Wenigblütige | Stiff Sunflower | Asteraceae |
| Helianthus strumosus | Sonnenblume Kropfige | Pale- leaved Sunflower | Asteraceae |
| Helianthus tuberosus | Topinambur | Tuberous Sunflower | Asteraceae |
| Helianthus x laetiflorus | Sonnenblume Blühfreudige | Cheerful Sunflower | Asteraceae |
| Helianthus x multiflorus | Topinambur | Tuberous Sunflower | Asteraceae |
| Helichrysum amorginum | Strohblume Amorgos | Amorgos Strawflower | Asteraceae |
| Helichrysum angustifolium | Strohblume Schmalblättrige | Narrow- leaved Strawflower | Asteraceae |
| Helichrysum arenarium | Strohblume Sand | Sand Strawflower | Asteraceae |
| Helichrysum crassifolium | Strohblume Dickblättrige | Thick- leaved Strawflower | Asteraceae |
| Helichrysum doerfleri | Strohblume Dörflers | Doerfler's Strawflower | Asteraceae |
| Helichrysum errerae | Strohblume Pantelleria | Pantelleria Strawflower | Asteraceae |
| Helichrysum foetidum | Strohblume Stinkende | Stinking Strawflower | Asteraceae |
| Helichrysum heldreichii | Strohblume Heldreichs | Heldreich's Strawflower | Asteraceae |
| Helichrysum italicum | Strohblume Italienische | Italian Strawflower | Asteraceae |
| Helichrysum massanellanum | Strohblume Massanella | Massanella Strawflower | Asteraceae |
| Helichrysum orientale | Strohblume Östliche | Eastern Strawflower | Asteraceae |
| Helichrysum pendulum | Strohblume Felsen | Rock Strawflower | Asteraceae |
| Helichrysum petiolare | Strohblume Lakritz | Silverbush Strawflower | Asteraceae |
| Helichrysum plicatum | Strohblume Gefaltete | Plicate Strawflower | Asteraceae |
| Helichrysum pendulum | Strohblume Felsen | Rock Strawflower | Asteraceae |
| Helichrysum saxatile | Strohblume Sardische | Sardinian Strawflower | Asteraceae |
| Helichrysum serotinum | Strohblume Spätblühende | Late- flowering Strawflower | Asteraceae |
| Helichrysum sibthorpii | Strohblume Athos | Athos Strawflower | Asteraceae |
| Helichrysum stoechas | Strohblume Mittelmeer | Shrubby Strawflower | Asteraceae |
| Helichrysum taenari | Strohblume Kap Tenari | Cape Tenari Strawflower | Asteraceae |
| Helichrysum valentinum | Strohblume Valencia | Valencia Strawflower | Asteraceae |
| Helicodiceros muscivorus | Drachenmaul | Arum Dead Horse | Araceae |
| Heliosperma albanicum | Strahlensame Albanischer | Albanian Catchfly | Caryophyllaceae |
| Heliosperma alpestre | Strahlensame Großer | Big Alpine Catchfly | Caryophyllaceae |
| Heliosperma chromodontum | Strahlensame Farbzähniger | Colour- teethed Catchfly | Caryophyllaceae |
| Heliosperma intonsum | Strahlensame Langhaariger | Long- haired Catchfly | Caryophyllaceae |
| Heliosperma macranthum | Strahlensame Großblütiger | Big- flowered Catchfly | Caryophyllaceae |
| Heliosperma monachorum | Strahlensame Mönchs | Monk's Catchfly | Caryophyllaceae |
| Heliosperma nikolicii | Strahlensame Nikolics | Nikolic's Catchfly | Caryophyllaceae |
| Heliosperma oliverae | Strahlensame Oliveras | Olivera's Catchfly | Caryophyllaceae |
| Heliosperma pudibundum | Strahlensame Rosa | Pink Catchfly | Caryophyllaceae |
| Heliosperma pusillum | Strahlensame Kleiner | Small Alpine Catchfly | Caryophyllaceae |
| Heliosperma retzdorffianum | Strahlensame Retzdorffs | Retzdorff's Catchfly | Caryophyllaceae |
| Heliosperma tommasinii | Strahlensame Tommasinis | Tommasini's Catchfly | Caryophyllaceae |
| Heliosperma veselskyi | Strahlensame Veselskys | Veselsky's Catchfly | Caryophyllaceae |
| Heliotropium amplexicaule | Sonnenwende Stängelumfassende | Clasping Heliotrope | Boraginaceae |
| Heliotropium arborescens | Sonnenwende Garten | Garden Heliotrope | Boraginaceae |
| Heliotropium curassavicum | Sonnenwende Curacao | Seaside Heliotrope | Boraginaceae |
| Heliotropium dolosum | Sonnenwende Trügerische | Deceitful Heliotrope | Boraginaceae |
| Heliotropium europaeum | Sonnenwende Europäische | European Heliotrope | Boraginaceae |
| Heliotropium halacsyi | Sonnenwende Halacsy | Halacsy's Heliotrope | Boraginaceae |
| Heliotropium hirsutissimum | Sonnenwende Behaarte | Hairy Heliotrope | Boraginaceae |
| Heliotropium lasiocarpum | Sonnenwende Behaartfrüchtige | Wooly- fruited Heliotrope | Boraginaceae |
| Heliotropium suaveolens | Sonnenwende Wohlriechende | Fragrant Heliotrope | Boraginaceae |
| Heliotropium supinum | Sonnenwende Niederliegende | Prostrate Heliotrope | Boraginaceae |
| Helleborus atrorubens | Nieswurz Dunkelrote | Dark- Red Hellebore | Ranunculaceae |
| Helleborus bocconei | Nieswurz Boccones | Boccone's Hellebore | Ranunculaceae |
| Helleborus cyclophyllus | Nieswurz Rundblättrige | Greek Hellebore | Ranunculaceae |
| Helleborus dumetorum | Nieswurz Hecken | Bush Hellebore | Ranunculaceae |
| Helleborus foetidus | Nieswurz Stinkende | Stinking Hellebore | Ranunculaceae |
| Helleborus lividus | Nieswurz Balearen | Majorcan Hellebore | Ranunculaceae |
| Helleborus multifidus | Nieswurz Vielblütige | Cleaved- foliated Hellebore | Ranunculaceae |
| Helleborus niger | Nieswurz Schwarze | Black Hellebore | Ranunculaceae |
| Helleborus odorus | Nieswurz Duft | Bush Hellebore | Ranunculaceae |
| Helleborus orientalis | Nieswurz Orientalische | Oriental Hellebore | Ranunculaceae |
| Helleborus purpurascens | Nieswurz Purpur | Fragrant Hellebore | Ranunculaceae |
| Helleborus serbicus | Nieswurz Serbische | Bosnian Hellebore | Ranunculaceae |
| Helleborus viridis | Nieswurz Grüne | Breen Hellebore | Ranunculaceae |
| Helleborus x hybridus | Nieswurz Hybrid | Black Hellebore | Ranunculaceae |
| Hellenocarum depressum | Kümmel Niederliegender | Depressed Caraway | Apiaceae |
| Hellenocarum multiflorum | Kümmel Vielblütiger | Greek Caraway | Apiaceae |
| Hellenocarum strictum | Kümmel Steifer | Stiff Caraway | Apiaceae |
| Helminthotheca aculeata | Wurmlattich Stechender | Pungent Ox-Tongue | Asteraceae |
| Helminthotheca comosa | Wurmlattich Schopfiger | Tufted Ox-Tongue | Asteraceae |
| Helminthotheca echioides | Wurmlattich Gewöhnlicher | Bristly Ox-Tongue | Asteraceae |
| Helminthotheca spinosa | Wurmlattich Dorniger | Spinose Ox-Tongue | Asteraceae |
| Helosciadium bermejoi | Sumpfsellerie Bermejos | Bermejo's Marshwort | Apiaceae |
| Helosciadium crassipes | Sumpfsellerie Dickfüßiger | Thickfoot Marshwort | Apiaceae |
| Helosciadium inundatum | Sumpfsellerie Untergetauchter | Lesser Marshwort | Apiaceae |
| Helosciadium milfontium | Sumpfsellerie Milfontes | Milfontes Marshwort | Apiaceae |
| Helosciadium nodiflorum | Sumpfsellerie Knotenblütiger | European Marshwort | Apiaceae |
| Helosciadium repens | Sumpfsellerie Kriechender | Creeping Marshwort | Apiaceae |
| Hemerocallis fulva | Taglilie Rotgelbe | Orange Daylily | Hemerocallidaceae |
| Hemerocallis lilioasphodelus | Taglilie Gelbe | Yellow Daylily | Hemerocallidaceae |
| Hepatica nobilis | Leberblümchen Dreilappiges | Three- lobed Liverwort | Ranunculaceae |
| Hepatica transsilvanica | Leberblümchen Siebenbürger | Transsylvanian Liverwort | Ranunculaceae |
| Heptaptera angustifolia | Heptaptera Schmalblättrige | Narrow- leaved Cachrys | Apiaceae |
| Heptaptera colladonioides | Heptaptera Colladoniaähnliche | Colladonia- like Cachrys | Apiaceae |
| Heptaptera macedonica | Heptaptera Mazedonische | Macedonian Cachrys | Apiaceae |
| Heracleum alpinum | Bärenklau Alpen | Alpine Hogweed | Apiaceae |
| Heracleum austriacum | Bärenklau Österreichischer | Austrian Hogweed | Apiaceae |
| Heracleum mantegazzianum | Bärenklau Riesen | Giant Hogweed | Apiaceae |
| Heracleum orphanidis | Bärenklau Orphanides | Orphanides's Hogweed | Apiaceae |
| Heracleum orsinii | Bärenklau Orsinis | Orsini's Hogweed | Apiaceae |
| Heracleum platytaenium | Bärenklau Breitblättriger | Wide- leaved Hogweed | Apiaceae |
| Heracleum pyrenaicum | Bärenklau Pyrenäen | Pyrenean Hogweed | Apiaceae |
| Heracleum pumilum | Bärenklau Kleiner | Lesser Hogweed | Apiaceae |
| Heracleum sibiricum | Bärenklau Sibirischer | Sibirian Hogweed | Apiaceae |
| Heracleum sphondylium | Bärenklau Wiesen | Common Hogweed | Apiaceae |
| Heracleum ternatum | Bärenklau Dreiblättriger | Ternate Hogweed | Apiaceae |
| Herminum monorchis | Honigorchis Einknollige | Musk Orchid | Orchidaceae |
| Herniaria algarvica | Bruchkraut Algarve | Algarve Ruptureworth | Caryophyllaceae |
| Herniaria alpina | Bruchkraut Alpen | Alpine Rupturewort | Caryophyllaceae |
| Herniaria baetica | Bruchkraut Andalusisches | Andalusian Rupturewort | Caryophyllaceae |
| Herniaria boissieri | Bruchkraut Boissier | Boissier's Rupturewort | Caryophyllaceae |
| Herniaria bornmuelleri | Bruchkraut Bornmüllers | Bornmueller's Rupturewort | Caryophyllaceae |
| Herniaria ciliolata ssp. robusta | Bruchkraut Robustes Fransiges | Fringed Rupturewort | Caryophyllaceae |
| Herniaria degenii | Bruchkraut Degens | Degen's Rupturewort | Caryophyllaceae |
| Herniaria fontanesii | Bruchkraut Quell | Desfontaine's Rupturewort | Caryophyllaceae |
| Herniaria fruticosa | Bruchkraut Strauchiges | Shrubby Rupturewort | Caryophyllaceae |
| Herniaria glabra | Bruchkraut Kahles | Smooth Rupturewort | Caryophyllaceae |
| Herniaria hirsuta | Bruchkraut Behaartes | Hairy Rupturewort | Caryophyllaceae |
| Herniaria incana | Bruchkraut Graues | Gray Rupturewort | Caryophyllaceae |
| Herniaria latifolia | Bruchkraut Breitblättriges | Broad- leaved Rupturewort | Caryophyllaceae |
| Herniaria litardierei | Bruchkraut Litardieres | Litardiere's Rupturewort | Caryophyllaceae |
| Herniaria lusitanica | Bruchkraut Portugiesisches | Portuguese Rupturewort | Caryophyllaceae |
| Herniaria maritima | Bruchkraut Meeresstrand | Sea Rupturewort | Caryophyllaceae |
| Herniaria micrantha | Bruchkraut Kleinblütiges | Small- flowered Rupturewort | Caryophyllaceae |
| Herniaria nigrimontium | Bruchkraut Montenegro | Montenegran Rupturewort | Caryophyllaceae |
| Herniaria parnassica | Bruchkraut Parnass | Greek Rupturewort | Caryophyllaceae |
| Herniaria permixta | Bruchkraut Verwirrendes | Confusing Rupturewort | Caryophyllaceae |
| Herniaria scabrida | Bruchkraut Raues | Scabrid Rupturewort | Caryophyllaceae |
| Hesperocyparis arizonica | Zypresse Arizona | Arizona Cypress | Cupressaceae |
| Hesperocyparis lusitanica | Zypresse Mexikanische | Mexican Cypress | Cupressaceae |
| Hesperocyparis macrocarpa | Zypresse Monterey | Monterey Cypress | Cupressaceae |
| Heteranthemis viscidehirta | Ochsenauge Klebriges | Sticky Oxeye | Pontederiaceae |
| Heteranthera limosa | Trugkölbchen Schlamm | Blue Mudplantain | Pontederiaceae |
| Heteranthera reniformis | Trugkölbchen Nierenförmiges | Kidnealeaf Mudplantain | Pontederiaceae |
| Heteranthera rotundifolia | Trugkölbchen Rundblättrriges | Roundleaf Mudplantain | Pontederiaceae |
| Hibiscus cannabinus | Roseneibisch Hanfblättriger | Brown Indianhemp | Malvaceae |
| Hibiscus moscheutos | Roseneibisch Sumpf | Crimsoneyed Rosemallow | Malvaceae |
| Hibiscus sabdariffa | Roseneibisch Rosella | Sour Tea | Malvaceae |
| Hibiscus rosa- sinensis | Roseneibisch Chinesischer | Shoeblackplant | Malvaceae |
| Hibiscus syriacus | Roseneibisch Freiland | Rose of Sharon | Malvaceae |
| Hibiscus trionum | Roseneibisch Stunden | Flower of an hour | Malvaceae |
| Hieracium alpinum | Habichtskraut Alpen | Alpine Hawkweed | Asteraceae |
| Hieracium bifidum | Habichtskraut Gabeliges | Livid Hawkweed | Asteraceae |
| Hieracium bocconei | Habichtskraut Boccones | Mountain Hawkweed | Asteraceae |
| Hieracium bracteolatum | Habichtskraut Tragblättriges | Bracted Hawkweed | Asteraceae |
| Hieracium brevifolium | Habichtskraut Kurzblatt | Short- leaved Hawkweed | Asteraceae |
| Hieracium bupleuroides | Habichtskraut Hasenohr | Hare- ear Hawkweed | Asteraceae |
| Hieracium caesium | Habichtskraut Blaugraues | Bluish- grey Hawkweed | Asteraceae |
| Hieracium dentatum | Habichtskraut Gezähntes | Toothed Hawkweed | Asteraceae |
| Hieracium franconicum | Habichtskraut Fränkisches | Franconian Hawkweed | Asteraceae |
| Hieracium fuscocinereum | Habichtskraut Pfeilblättriges | Sagittate Hawkweed | Asteraceae |
| Hieracium glabratum | Habichtskraut Verkahlendes | Glabrous Hawkweed | Asteraceae |
| Hieracium glanduliferum | Habichtskraut Grauzottiges | Glanduliferous Hawkweed | Asteraceae |
| Hieracium glaucinum | Habichtskraut Frühblühendes | Early Hawkweed | Asteraceae |
| Hieracium glaucum | Habichtskraut Blaugrünes | Glaucous Hawkweed | Asteraceae |
| Hieracium humile | Habichtskraut Niedriges | Dwarf Hawkweed | Asteraceae |
| Hieracium intybaceum | Habichtskraut Zichorien | Whitish Hawkweed | Asteraceae |
| Hieracium inuloides | Habichtskraut Alantblättriges | Butterfly Hawkweed | Asteraceae |
| Hieracium jurassicum | Habichtskraut Jura | Jurassic Hawkweed | Asteraceae |
| Hieracium lachenalii | Habichtskraut Gewöhnliches | Lachenal's Hawkweed | Asteraceae |
| Hieracium laevigatum | Habichtskraut Glattes | Smooth Hawkweed | Asteraceae |
| Hieracium levicaule | Habichtskraut Glattstängeliges | Smooth- stalked Hawkweed | Asteraceae |
| Hieracium lycopifolium | Habichtskraut Wolfstrappblättriges | Gypsiwort- leaved Hawkweed | Asteraceae |
| Hieracium maculatum | Habichtskraut Geflecktes | Spotted Hawkweed | Asteraceae |
| Hieracium murorum | Habichtskraut Wald | Wall Hawkweed | Asteraceae |
| Hieracium onosmoides | Habichtskraut Lotwurzblättriges | Goldendrop- like Hawkweed | Asteraceae |
| Hieracium pallescens | Habichtskraut Verbleichendes | Fading Hawkweed | Asteraceae |
| Hieracium pannosum | Habichtskraut Wolliges | Wooly Hawkweed | Asteraceae |
| Hieracium pilosum | Habichtskraut Weißhaariges | Moris's Hawkweed | Asteraceae |
| Hieracium prenanthoides | Habichtskraut Hasenlattich | Prenanthes- like Hawkweed | Asteraceae |
| Hieracium pseudocorymbosum | Habichtskraut Schirmtraubiges | False- corymb Hawkweed | Asteraceae |
| Hieracium racemosum | Habichtskraut Trauben | Racemose Hawkweed | Asteraceae |
| Hieracium sabaudum | Habichtskraut Savoyer | Savoy Hawkweed | Asteraceae |
| Hieracium saxifragum | Habichtskraut Steinbrech | Saxifrage Hawkweed | Asteraceae |
| Hieracium schmidtii | Habichtskraut Blasses | Schmidt's Hawkweed | Asteraceae |
| Hieracium scorzonerifolium | Habichtskraut Schwarzwurzelblättriges | Scorzonera- leaved Hawkweed | Asteraceae |
| Hieracium umbellatum | Habichtskraut Dolden | Narrow- leaved Hawkweed | Asteraceae |
| Hieracium valdepilosum | Habichtskraut Starkbehaartes | Densly- hairy Hawkweed | Asteraceae |
| Hieracium vasconicum | Habichtskraut Lorbeerartiges | Laurel- like Hawkweed | Asteraceae |
| Hieracium villosum | Habichtskraut Zottiges | Shaggy Hawkweed | Asteraceae |
| Himantoglossum adriaticum | Riemenzunge Adriatische | Adriatic Lizard Orchid | Orchidaceae |
| Himantoglossum comperianum | Bartorchis Fadenförmige | Kompers's Orchid | Orchidaceae |
| Himantoglossum hircinum | Riemenzunge Bocks | Lizard Orchid | Orchidaceae |
| Himantoglossum jankae | Riemenzunge Jankas | Janka's Lizard Orchid | Orchidaceae |
| Himantoglossum robertianum | Roberts Mastorchis | Giant Orchid | Orchidaceae |
| Himantoglossum samariense | Riemenzunge Kretische | Cretan Lizard Orchid | Orchidaceae |
| Hippocrepis balearica | Hufeisenklee Balearen | Balearic Horseshoe Vetch | Fabaceae |
| Hippocrepis biflora | Hufeisenklee Zweiblütiger | Two- flowered Horseshoe Vetch | Fabaceae |
| Hippocrepis bourgaei | Hufeisenklee Bourgeaus | Bourgeau's Horseshoe Vetch | Fabaceae |
| Hippocrepis carpetana | Hufeisenklee Carpetana | Carpetana Horseshoe Vetch | Fabaceae |
| Hippocrepis castroviejoi | Hufeisenklee Castroviejos | Castroviejos Horseshoe Vetch | Fabaceae |
| Hippocrepis ciliata | Hufeisenklee Schmalblättriger | Narrow- leaved Horseshoe Vetch | Fabaceae |
| Hippocrepis commutata | Hufeisenklee Verwechselter | Confused Horseshoe Vetch | Fabaceae |
| Hippocrepis comosa | Hufeisenklee Schopf | Comose Horseshoe Vetch | Fabaceae |
| Hippocrepis conradiae | Hufeisenklee Korsischer | Corsican Horseshoe Vetch | Fabaceae |
| Hippocrepis cyclocarpa | Hufeisenklee Kreisfrüchtiger | Circle- fruited Horseshoe Vetch | Fabaceae |
| Hippocrepis emerus | Strauchwicke | Scorpion Senna | Fabaceae |
| Hippocrepis eriocarpa | Hufeisenklee Wollfrüchtiger | Wooly- fruited Horseshoe Vetch | Fabaceae |
| Hippocrepis fruticescens | Hufeisenklee Strauchähnlicher | Bush- like Horseshoe Vetch | Fabaceae |
| Hippocrepis glauca | Hufeisenklee Schopf | Comose Horseshoe Vetch | Fabaceae |
| Hippocrepis grosii | Hufeisenklee Gros' | Gros's Horseshoe Vetch | Fabaceae |
| Hippocrepis multisiliquosa | Hufeisenklee Vielblütiger | Many- flowered Horseshoe Vetch | Fabaceae |
| Hippocrepis nevadensis | Hufeisenklee Sierra Nevada | Sierra Nevada Horseshoe Vetch | Fabaceae |
| Hippocrepis prostrata | Hufeisenklee Niederliegender | Prostrate Horseshoe Vetch | Fabaceae |
| Hippocrepis rupestris | Hufeisenklee Felsen | Rock Horseshoe Vetch | Fabaceae |
| Hippocrepis salzmannii | Hufeisenklee Salzmanns | Salzmann's Horseshoe Vetch | Fabaceae |
| Hippocrepis scabra | Hufeisenklee Rauer | Rough Horseshoe Vetch | Fabaceae |
| Hippocrepis scorpioides | Hufeisenklee Skorpion | Scorpion Horseshoe Vetch | Fabaceae |
| Hippocrepis squamata | Hufeisenklee Schuppen | Squamose Horseshoe Vetch | Fabaceae |
| Hippocrepis tavera- mendozae | Hufeisenklee Tavera Mondozas | Tavera Mendoza's Horseshoe Vetch | Fabaceae |
| Hippocrepis unisiliquosa | Hufeisenklee Einblütiger | One- flowered Horseshoe Vetch | Fabaceae |
| Hippocrepis valentina | Hufeisenklee Valenzianischer | Valecian Horseshoe Vetch | Fabaceae |
| Hippophae rhamnoides | Sanddorn Gewöhnlicher | Common Sea Buckthorne | Elaeagnaceae |
| Hippuris vulgaris | Tannenwedel Gewöhnlicher | Common Mare's- Tail | Plantaginaceae |
| Hispidella hispanica | Hispidelle Spanische | Spanish Hispidella | Asteraceae |
| Hladnikia pastinacifolia | Pastinakenblättrige Hladnikia | Parsnip- leaved Hladnikia | Apiaceae |
| Hohenackeria exscapa | Hohenackerie Schaftlose | Stemless Hohenackeria | Apiaceae |
| Hohenackeria polyodon | Hohenackerie Vielzähnige | Many- toothed Hohenackeria | Apiaceae |
| Holosteum umbellatum | Spurre Dolden | Jagged Chickweed | Caryophyllaceae |
| Homogyne alpina | Alpenlattich Gewöhnlicher | Purple Colt's Foot | Asteraceae |
| Homogyne discolor | Alpenlattich Filziger | Discolores Colt's Foot | Asteraceae |
| Homogyne sylvestris | Alpenlattich Wald | Wood Colt's Foot | Asteraceae |
| Honckenya peploides | Salzmiere Gewöhnliche | Sea Sandwort | Caryophyllaceae |
| Horminum pyrenaicum | Drachenmaul Pyrenäen | Pyrenean Deadnettle | Lamiaceae |
| Hormusakia aggregata | Ochsenzunge Dichtblütige | Dense Alkanet | Lamiaceae |
| Horstrissea dolinicola | Horstrissea Dolinenbewohnende | Doline Horstrissea | Apiaceae |
| Hosta ventricosa | Funkie Glocken | Blue Plantain Lily | Agavaceae |
| Hosta x fortunei | Funkie Graublatt | Fortunes Plantain Lily | Agavaceae |
| Hottonia inflata | Wasserfeder Amerikanische | American Featherfoil | Primulaceae |
| Hottonia palustris | Wasserfeder Europäische | Water Violet | Primulaceae |
| Humulus lupulus | Hopfen Gewöhnlicher | Common Hop | Cannabaceae |
| Humulus scandens | Hopfen Japanischer | Japanese Hop | Cannabaceae |
| Huperzia selago | Teufelsklaue Tannen | Fir Clubmoss | Lycopodiaceae |
| Hyacinthella dalmatica | Zwerghyazinthe Dalmatische | Dalmatian Hyacinthella | Hyacinthaceae |
| Hyacinthella leucophaea | Zwerghyazinthe Bleiche | Pale Hyacinthella | Hyacinthaceae |
| Hyacinthoides mauritanica | Hasenglöckchen Mauretanische | Mauretanian Bluebell | Hyacinthaceae |
| Hyacinthoides non- scripta | Hasenglöckchen Atlantisches | English Bluebell | Hyacinthaceae |
| Hyacinthoides paivae | Hasenglöckchen Paivas | Paiva's Bluebell | Hyacinthaceae |
| Hyacinthoides reverchonii | Hasenglöckchen Reverchons | Reverchon's Bluebell | Hyacinthaceae |
| Hyacinthoides hispanica | Hasenglöckchen Spanisches | Spanish Bluebell | Hyacinthaceae |
| Hyacinthoides x massartiana | Hasenglöckchen Bastard | Hybrid Bluebell | Hyacinthaceae |
| Hyacinthus orientalis | Hyazinthe Garten | Garden Hyacinth | Hyacinthaceae |
| Hydrangea arborescens | Hortensie Wald | Smooth Hydrangea | Hydrangeaceae |
| Hydrangea macrophylla | Hortensie Garten | Bigleaf Hydrangea | Hydrangeaceae |
| Hydrangea paniculata | Hortensie Rispige | Panicled Hydrangea | Hydrangeaceae |
| Hydrilla verticillata | Grundnessel Quirlblättrige | Esthwaite Waterweed | Hydrocharitaceae |
| Hydrocotyle bonariensis | Wassernabel Buenos- Aires | Buenos Aires Pennywort | Araliaceae |
| Hydrocotyle ranunculoides | Wassernabel Großer | Buttercup Pennywort | Araliaceae |
| Hydrocotyle sibthorpioides | Wassernabel Geldwurzähnlicher | Lawn Pennywort | Araliaceae |
| Hydrocotyle verticillata | Wassernabel Quirl | Whorled Pennywort | Araliaceae |
| Hydrocotyle vulgaris | Wassernabel Gewöhnlicher | Common Pennywort | Araliaceae |
| Hydrocharis morsus- ranae | Froschbiss Europäischer | European Frogbit | Hydrochariaceae |
| Hylotelephium anacampseros | Waldfetthenne Rundblättrige | Love- Restoring Stonecrop | Crassulaceae |
| Hylotelephium maximum | Waldfetthenne Große | Frog's Stomach | Crassulaceae |
| Hylotelephium spectabile | Waldfetthenne Prächtige | Showy Stonecrop | Crassulaceae |
| Hylotelephium telephium | Waldfetthenne Rundblättrige | Witch's Moneybags | Crassulaceae |
| Hylotelephium vulgare | Waldfetthenne Berg | Mountain Orpine | Crassulaceae |
| Hymenonocarpos circinnatus | Pfennigklee Gewöhnlicher | Spiny Kidney Vetch | Fabaceae |
| Hymenonocarpos cornicina | Wundklee Rabenschwarzer | Black Kidney Vetch | Fabaceae |
| Hymenonocarpos hamosus | Wundklee Haken | Hook Kidney Vetch | Fabaceae |
| Hymenonocarpos lotoides | Wundklee Hornkleeähnlicher | Lotus- like Kidney Vetch | Fabaceae |
| Hymenonema graecum | Hymenonema Griechische | Greek Hymenonema | Asteraceae |
| Hymenonema laconicum | Hymenonema Lakonische | Laconian Hymenonema | Asteraceae |
| Hymenophyllum tunbrigense | Hautfarn Englischer | Tunbridge Filmy Fern | Hymenophyllaceae |
| Hymenophyllum wilsonii | Hautfarn Wilsons | Wilson's Filmy Fern | Hymenophyllaceae |
| Hyoscamus albus | Bilsenkraut Weißes | White Henbane | Solanaceae |
| Hyoscamus aureus | Bilsenkraut Goldgelbes | Golden Henbane | Solanaceae |
| Hyoscamus niger | Bilsenkraut Schwarzes | Black Henbane | Solanaceae |
| Hyoseris lucida | Schweinssalat Glänzender | Shining Hyoseris | Asteraceae |
| Hyoseris radiata | Schweinssalat Strahliger | Perennial Hyoseris | Asteraceae |
| Hyoseris scabra | Schweinssalat Rauer | Annual Hyoseris | Asteraceae |
| Hypecoum imberbe | Lappenblume Bartlose | Sicklefruit Hypecoum | Papaveraceae |
| Hypecoum littorale | Lappenblume Strand | Sea Hypecoum | Papaveraceae |
| Hypecoum pendulum | Lappenblume Hängende | Nodding Hypecoum | Papaveraceae |
| Hypecoum procumbens | Lappenblume Niederliegende | Creeping Hypecoum | Papaveraceae |
| Hypecoum pseudograndiflorum | Lappenblume Falsche Großblütige | False Big- flowered Hypecoum | Papaveraceae |
| Hypecoum torulosum | Lappenblume Gliederfrüchtige | Torulose Hypecoum | Papaveraceae |
| Hypericum aciferum | Johanniskraut Kretisches | Cretan St. Johns Wort | Hypericaceae |
| Hypericum aegypticum | Johanniskraut Ägyptisches | Egyptian St. Johns Wort | Hypericaceae |
| Hypericum amblycalyx | Johanniskraut Stumpfkelchiges | Blunt- calyced St. Johns Wort | Hypericaceae |
| Hypericum androsaemum | Johanniskraut Blut | Sweet Amber | Hypericaceae |
| Hypericum annulatum | Johanniskraut Geringeltes | Annulate St. Johns Wort | Hypericaceae |
| Hypericum athoum | Johanniskraut Athos | Athos St. Johns Wort | Hypericaceae |
| Hypericum atomarium | Johanniskraut Weißfilziges | Wooly St. Johns Wort | Hypericaceae |
| Hypericum aucheri | Johanniskraut Auchers | Aucher's St. Johns Wort | Hypericaceae |
| Hypericum australe | Johanniskraut Südliches | Southern St. Johns Wort | Hypericaceae |
| Hypericum balearicum | Johanniskraut Balearen | Balearic St. Johns Wort | Hypericaceae |
| Hypericum barbatum | Johanniskraut Bart | Bearded St. Johns Wort | Hypericaceae |
| Hypericum boehlingraabei | Johanniskraut Korakofolia | Korakofolia St. Johns Wort | Hypericaceae |
| Hypericum calycinum | Johanniskraut Großkelchiges | Creeping St. Johns Wort | Hypericaceae |
| Hypericum canadense | Johanniskraut Kanadisches | Canadian St. Johns Wort | Hypericaceae |
| Hypericum caprifolium | Johanniskraut Geißblättriges | Goat- leaf St. Johns Wort | Hypericaceae |
| Hypericum cerastioides | Johanniskraut Rhodopen | Trailing St. Johns Wort | Hypericaceae |
| Hypericum coris | Johanniskraut Quirlblättriges | Verticillate St. Johns Wort | Hypericaceae |
| Hypericum corsicum | Johanniskraut Korsisches | Corsican St. Johns Wort | Hypericaceae |
| Hypericum cuisinii | Johanniskraut Cuisins | Cuisin St. Johns Wort | Hypericaceae |
| Hypericum cycladicum | Johanniskraut Kykladen | Kiklades St. Johns Wort | Hypericaceae |
| Hypericum delphicum | Johanniskraut Dirfis | Dirfis St. Johns Wort | Hypericaceae |
| Hypericum elegans | Johanniskraut Zierliches | Elegant St. Johns Wort | Hypericaceae |
| Hypericum elodes | Johanniskraut Sumpf | Marsh St. Johns Wort | Hypericaceae |
| Hypericum elongatum | Johanniskraut Verlängertes | Elongated St. Johns Wort | Hypericaceae |
| Hypericum empetrifolium | Johanniskraut Krähenbeerenblättriges | Crowberry- leaved St. Johns Wort | Hypericaceae |
| Hypericum ericoides | Johanniskraut Heidekrautähnliches | Heather- like St. Johns Wort | Hypericaceae |
| Hypericum fragile | Johanniskraut Zerbrechliches | Fragile St. Johns Wort | Hypericaceae |
| Hypericum gentianoides | Johanniskraut Enzianähnliches | Orangegrass | Hypericaceae |
| Hypericum haplophylloides | Johanniskraut Albanisches | Albanian St. Johns Wort | Hypericaceae |
| Hypericum hircinum | Johanniskraut Bocks | Creeping St. Johns Wort | Hypericaceae |
| Hypericum hirsutum | Johanniskraut Behaartes | Hairy St. Johns Wort | Hypericaceae |
| Hypericum hispanicum | Johanniskraut Spanisches | Spanish St. Johns Wort | Hypericaceae |
| Hypericum humifusum | Johanniskraut Liegendes | Slender St. Johns Wort | Hypericaceae |
| Hypericum hyssopifolius | Johanniskraut Ysop | Hyssop- leaved St. Johns Wort | Hypericaceae |
| Hypericum icaricum | Johanniskraut Ikarisches | Ikarian St. Johns Wort | Hypericaceae |
| Hypericum jovis | Johanniskraut Jupiter | Jupiter St. Johns Wort | Hypericaceae |
| Hypericum kelleri | Johanniskraut Kellers | Keller's St. Johns Wort | Hypericaceae |
| Hypericum linarioides | Johanniskraut Leinkrautähnliches | Toadflax- like St. Johns Wort | Hypericaceae |
| Hypericum linariifolium | Johanniskraut Leinkrautblättriges | Toadflax- leaved St. Johns Wort | Hypericaceae |
| Hypericum maculatum | Johanniskraut Geflecktes | Imperforate St. Johns Wort | Hypericaceae |
| Hypericum majus | Johanniskraut Großes | Large St. Johns Wort | Hypericaceae |
| Hypericum montbretii | Johanniskraut Montbrets | Montbret's St. Johns Wort | Hypericaceae |
| Hypericum montanum | Johanniskraut Berg | Pale St. Johns Wort | Hypericaceae |
| Hypericum mutilum | Johanniskraut Kleinblütiges | Dwarf St. Johns Wort | Hypericaceae |
| Hypericum nummularium | Johanniskraut Pfennigblättriges | Round- leaved St. Johns Wort | Hypericaceae |
| Hypericum olympicum | Johanniskraut Olymp | Mount Olympus St. Johns Wort | Hypericaceae |
| Hypericum perfoliatum | Johanniskraut Stängelumfassendes | Perfoliate St. Johns Wort | Hypericaceae |
| Hypericum perforatum | Johanniskraut Tüpfel | Perforate St. Johns Wort | Hypericaceae |
| Hypericum pubescens | Johanniskraut Flaumiges | Pubescent St. Johns Wort | Hypericaceae |
| Hypericum pulchrum | Johanniskraut Schönes | Slender St. Johns Wort | Hypericaceae |
| Hypericum richeri | Johanniskraut Richers | Richer's St. Johns Wort | Hypericaceae |
| Hypericum rumeliacum | Johanniskraut Rumelisches | Rumelian St. Johns Wort | Hypericaceae |
| Hypericum spruneri | Johanniskraut Spruners | Spruner's St. Johns Wort | Hypericaceae |
| Hypericum taygeteum | Johanniskraut Taygetos | Taygetos St. Johns Wort | Hypericaceae |
| Hypericum tetrapterum | Johanniskraut Geflügeltes | Square- stalked St. Johns Wort | Hypericaceae |
| Hypericum thasium | Johanniskraut Thasos | Thasos St. Johns Wort | Hypericaceae |
| Hypericum tometosum | Johanniskraut Filziges | Tomentose St. Johns Wort | Hypericaceae |
| Hypericum trichocaulon | Johanniskraut Kretisches | Cretan St. Johns Wort | Hypericaceae |
| Hypericum triquetrifolium | Johanniskraut Krausblättriges | Triangular St. Johns Wort | Hypericaceae |
| Hypericum tymfresteum | Johanniskraut Timfristos | Timfristos St. Johns Wort | Hypericaceae |
| Hypericum umbellatum | Johanniskraut Dolden | Umbellate St. Johns Wort | Hypericaceae |
| Hypericum undulatum | Johanniskraut Gewelltes | Wavy St. Johns Wort | Hypericaceae |
| Hypericum vesiculosum | Johanniskraut Blasen | Bladder St. Johns Wort | Hypericaceae |
| Hypericum x desetangsii | Johanniskraut Des Etangs' | Des Etangs's St. Johns Wort | Hypericaceae |
| Hypericum x inodorum | Johanniskraut Geruchloses | Tall Tutsan | Hypericaceae |
| Hypochaeris achyrophorus | Ferkelkraut Mittelmeer | Mediterranean Cat's- Ear | Asteraceae |
| Hypochaeris cretensis | Ferkelkraut Kretisches | Cretan Cat's- Ear | Asteraceae |
| Hypochaeris facchiniana | Ferkelkraut Facchinis | Facchini's Cat's- Ear | Asteraceae |
| Hypochaeris glabra | Ferkelkraut Kahles | Smooth Cat's- Ear | Asteraceae |
| Hypochaeris laevigata | Ferkelkraut Glattes | Smooth Cat's- Ear | Asteraceae |
| Hypochaeris maculata | Ferkelkraut Geflecktes | Spotted Cat's- Ear | Asteraceae |
| Hypochaeris radicata | Ferkelkraut Gewöhnliches | Common Cat's- Ear | Asteraceae |
| Hypochaeris robertia | Ferkelkraut Roberts | Robert's Cat's- Ear | Asteraceae |
| Hypochaeris rutea | Ferkelkraut Sierra de Ruta | Sierra de Ruta Cat's- Ear | Asteraceae |
| Hypochaeris salzmanniana | Ferkelkraut Salzmanns | Salzmann's Cat's- Ear | Asteraceae |
| Hypochaeris sardoa | Ferkelkraut Sardisches | Sardinian Cat's- Ear | Asteraceae |
| Hypochaeris tenuiflora | Ferkelkraut Zartblütiges | Slender- flowered Cat's- Ear | Asteraceae |
| Hypochaeris uniflora | Ferkelkraut Einköpfiges | One- Headed Cat's- Ear | Asteraceae |
| Hypopitys hypophegea | Buchenspargel | Glabrous Yellow Bird's-Nest | Ericaceae |
| Hypopitys monotropa | Fichtenspargel | Hairy Yellow Bird's-Nest | Ericaceae |
| Hyssopus officinalis | Ysop Echter | Common Hyssop | Lamiaceae |