| H |
| Habenaria
spp., Fringed orchids |
| Habranthus,
Rain lily |
| Hakonechloa
macro Aureola, Golden
hakonechloa |
| Hakonechloa
macro, Hakone
grass |
| Halesia
carolina (tetraptera), Carolina silverbell; Mountain silverbell |
| Halesia
diptera, American snowdrop tree; Twowinged silver bell |
| Halesia
tetraptera (Halesia carolina), Carolina silverbell |
| Halesia
tetraptera var.
monticola, Mountain silverbell |
| Hamamelis
macrophylla, Southern witch hazel |
| Hamamelis
mollis, Chinese witchhazel |
| Hamamelis
vernalis, Vernal witchhazel |
| Hamamelis
virginiana, Common witch hazel |
| Hamamelis
x
intermedia, H. x media, Witchhazel hybrids |
| Hedera
canariensis, Algerian ivy, Canary Island ivy |
| Hedera
colchica, Chochis ivy, Persian ivy |
| Hedera
helix , English ivy |
|
Hedychium
coronarium, White ginger
|
| Helenium
autumnale,Sneezeweed |
|
Helianthus
spp., Sunflower
|
| Helianthus
annuus Sunflower |
| Helianthus
spp., Sunflower |
| Helichrysum
bracteatum, Strawflower |
| Helictotrichor
sempervirens (Avena sempervirens), Blue
oats grass |
|
Heliopsis
helianthoides, Heliopsis
|
|
Heliotropium
amplexicaule, Creeping heliotrope
|
| Heliotropium
arborescens, Heliotrope |
| Helleborus
orientalis, Lenten rose |
| Hemerocallis,
Day Lily |
| Hepatica
americana,Liverleaf, Hepatica, Liverwort |
| Heptacodium
miconioides, Sevenson flower |
| Hesperis
matronnalis, Sweet rocket |
|
Heuchera
'Palace Purple', Palace Purple alumroot
|
|
Heuchera
sanguinea, Coral bells
|
|
Hibiscus
coccineus, Red hibiscus
|
| Hibiscus
moscheutos, Swamp mallow |
|
Hippeastrum
spp. = Amaryllis spp. , Dutch Amaryllis, South African
Amaryllis
|
| Hosta
spp.,
Hosta |
| Houstonia
spp., Bluets, Houstonia |
| Hovenia
dulcis, Japanese raisin tree |
| Humulus
lupulus, Common hops |
|
Hyacinthus
orientalis, Dutch Hyacinths
|
| Hydrangea
anomala subsp. Petiolaris, Climbing hydrangea |
| Hydrangea
arborescens, Wild hydrangea; Smooth hydrangea |
| Hydrangea
quercifolia, Oakleaf hydrangea |
| Hymenocallis,
Spider lily, Ismene, Peruvian daffodil, Sea daffodil |
| Hypericum
calycinum, St. John's wort |
| Hypericum
prolificum, St. John's wort |
| Hyssopus
officinalis, Hyssop |
| |