Gomphocarpus
Gomphrena
Goniolimon
Goodyera
Gordonia
Graptopetalum
Graptophyllum
Graptoveria
Grevillea
Grewia
Greyia
Grindelia
Griselina
Gunnera
Guzmania
Gymnocalycium
Gymnocarpium
Gymnocladus
Gynandriris
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Gynura
Gypsophila
Haageocereus
Haastia
Habenaria
Haberlea
Habranthus
Hacquetia
Haemanthus
Hakea
Hakonechloa
Halesia
Halimiocistus
Halimium
Halimodendron
Hamamelis
Haplopappus
Hardenbergia
Harrisia
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Hatiora
Haworthia
Hebe
Hechtia
Hedera
Hedychium
Hedyotis
Hedysarum
Hedyscepe
Helenium
Helianthemum
Helianthus
Helichrysum
Heliconia
Helictotrichon
Heliocereus
Heliophila
Heliopsis
Heliotropium
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Helleborus
Heloniopsis
Hemigraphis
Hepatica
Heptacodium
Heracleum
Herbertia
Hereroa
Hermannia
Hermodactylus
Hesperaloe
Hesperantha
Hesperis
Hesperocallis
Heterocentron
Heterotheca
Heuchera
Heucherella
Hibbertia
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Hibiscus
Hieracium
Himalayacalamus
Hippeastrum
Hippocrepis
Hippophae
Hohenbergia
Hohenbergiopsis
Hoheria
Holboellia
Holcus
Holmskioldia
Holodiscus
Homalocladium
Homeria
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