Hoodia
Hordeum
Horminum
Hosta
Hottonia
Houttuynia
Hovea
Hovenia
Howea
Hoya
Huernia
Humulus
Huntleya
Hyacinthella
Hyacinthoides
Hyacinthus
Hydrastis
Hydrocharis
Hydrocleys
Hydrocotyle
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Hygrophila
Hylocereus
Hylomecon
Hymenocallis
Hymenosporum
Hyophorbe
Hyoscyamus
Hypericum
Hyphaene
Hypocalymma
Hypoestes
Hypoxis
Hypsela
Hyssopus
Iberis
Ibervillea
Idesia
Ilex
Illicium
Impatiens
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Imperata
Incarvillea
Indigofera
Inula
Iochroma
Ipheion
Ipomoea
Ipomopsis
Iresine
Iris
Isatis
Isoplexis
Isopyrum
Itea
Ixia
Ixiolirion
Ixora
Jaborosa
Jacaranda
Jacquemontia
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Jamesia
Jancaea
Jasione
Jasminum
Jatropha
Jeffersonia
Jovellana
Jovibarba
Juanulloa
Jubaea
Juglans
Juncus
Juniperus
Justicia
Kadsura
Kaempferia
Kalanchoe
Kalimeris
Kalmia
Kalmiopsis
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Kalopanax
Kelseya
Kerria
Kigelia
Kirengeshoma
Kitaibela
Kleinia
Knautia
Knightia
Kniphofia
Koeleria
Koelreuteria
Kohleria
Kolkwitzia
Kosteletzkya
Kunzea
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