family Hirudinidae family Hirundinidae family Holocentridae family Holothuridae family Homaridae family Hominidae family Hostaceae family Hyacinthaceae family Hyaenidae family Hydnaceae
| family Hydnoraceae family Hydrangeaceae family Hydrobatidae family Hydrocharidaceae family Hydrocharitaceae family Hydrochoeridae (current term) family Hydrophidae family Hydrophyllaceae family Hygrophoraceae family Hylidae
| family Hylobatidae family Hymenophyllaceae family Hypericaceae family Hyperodontidae family Hypocreaceae family Hypodermatidae family Hypoxidaceae family Hystricidae family Ibidiidae family Ichneumonidae
|