Plants by Scientific Name
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]
Habenaria repens  |
water-spider orchid | Native Plant |
| Hamelia patens | firebush | Native Plant |
| Haplopappus divaricatus (syn. Croptilon divaricatum) | scratch daisy | Native Plant |
| Helianthus angustifolius var. canadense | narrowleaf sunflower | Native Plant |
| Helianthus radula | rayless sunflower, stiff sunflower | Native Plant |
| Heteranthera limosa | mud plantain | Non-native Plant |
| Hibiscus aculeatus | comfort root | Native Plant |
| Hibiscus coccineus | marsh hibiscus, scarlet rosemallow | Native Plant |
| Hibiscus grandiflorus | swamp rosemallow | Native Plant |
| Hippuris vulgaris | mare’s-tail | Non-native Plant |
| Houstonia procumbens | innocence | Native Plant |
| Hydrilla verticillata |
hydrilla | Non-native Plant |
| Hydrocharis morsus-ranae | European frog-bit | Non-native Plant |
| Hydrocotyle species |
water pennywort | Native Plant |
| Hydrolea corymbosa | bladderpod; bagpod | Native Plant |
| Hydrolea quadrivalvis | waterpod | Native Plant |
| Hygrophila costata (Syn. Hygrophila lacustris) | lake hygrophila | Native Plant |
| Hygrophila polysperma |
East Indian hygrophila | Non-native Plant |
| Hymenachne amplexicaulis | West Indian marsh grass | Non-native Plant |
| Hypericum cistifolium (Syn. H. opacum) |
roundpod St. John's-Wort | Native Plant |
| Hypericum fasciculatum | peelbark St. John's-Wort | Native Plant |
| Hypericum tetrapetalum | fourpetal St. John's-Wort | Native Plant |
| Hyptis alata | musky mint; clustered bushmint | Native Plant |
