Jump to genus: Hackelia, Hainardia, , Halerpestes, Halogeton, Harrimanella, Hebeloma, Hedera, Hedysarum, Helenium, Helianthella, Helianthus, Heliotropium, Helleborus, Helminthosphaeria, Helminthotheca, Helvella, Hemerocallis, Hemieva, Hemimycena, Hemistropharia, Hemitomes, Hemizonella, Heracleum, Hericium, Herniaria, Herteliana, Hesperis, Hesperochiron, Hesperostipa, Heteranthera, Heterobasidion, Heterocodon, Heterodermia, Heterotextus, Heterotheca, Heuchera, Heyderia, Hibiscus, Hieracium, Hierochloe, Hippuris, Hirschfeldia, Hohenbuehelia, Holcus, Holodiscus, Holosteum, Honckenya, Hordeum, Horkelia, Hornungia, Hosackia, Howellia, Hulsea, Humaria, Humidicutis, Humulus, Huperzia, Hyacinthoides, Hydnellum, Hydnoporia, Hydnotrya, Hydnum, Hydrilla, Hydrocharis, Hydrocotyle, Hydrophyllum, Hydropunctaria, Hydropus, Hygrocybe, Hygrophoropsis, , Hygrophorus, Hylocomium, Hylotelephium, Hymenopappus, Hymenophyllum, Hymenoxys, Hyoscyamus, Hypericum, Hyphodontia, Hypholoma, Hypocenomyce, Hypochaeris, Hypocrea, Hypogymnia, Hypomyces, Hypotrachyna, Hypoxylon, Hysterangium
