Hawkweed
(Hieracium flagellare)
Hairy Hawkweed
(Hieracium gronovii)
Meadow Hawkweed
(Hieracium caespitosum)
Panicled Hawkweed
(Hieracium paniculatum)
Rattlesnake Hawkweed
(Hieracium venosum)
Rough Hawkweed
(Hieracium scabrum)
American Hazelnut
(Corylus americana)
American Hazelnut
(Corylus americana)
Hairy-pod Hedge-mustard
(Sisymbrium officinale)
Tall Hedge-mustard
(Sisymbrium altissimum)
Hispid Hedge-nettle
(Stachys hispida)
Marsh Hedge-nettle
(Stachys pilosa)
American False Hellebore
(Veratrum viride)
Broad-leaved Helleborine
(Epipactis helleborine)
Climbing Hempweed
(Mikania scandens)
Henbit
(Lamium amplexicaule)
Roundlobed Hepatica
(Anemone americana)
Roundlobed Hepatica
(Anemone americana)
Herb Robert
(Geranium robertianum)
Herb-sophia
(Descurainia sophia)
Bitternut Hickory
(Carya cordiformis)
Bitternut Hickory
(Carya cordiformis)
American Hog-peanut
(Amphicarpaea bracteata var. bracteata)
Hairy American Hog-peanut
(Amphicarpaea bracteata var. comosa)
American Holly
(Ilex opaca var. opaca)
Winterberry Holly
(Ilex verticillata)
Annual Honesty
(Lunaria annua)
Canada Honewort
(Cryptotaenia canadensis)
Honey-locust
(Gleditsia triacanthos)
Amur Honeysuckle
(Lonicera maackii)
Japanese Honeysuckle
(Lonicera japonica)
Japanese Honeysuckle
(Lonicera japonica)
Trumpet Honeysuckle
(Lonicera sempervirens var. sempervirens)
Japanese Hops
(Humulus japonicus)
Japanese Hops
(Humulus japonicus)
Canada Horse-balm
(Collinsonia canadensis)
Horse-nettle
(Solanum carolinense var. carolinense)
Horsemint
(Monarda punctata subsp. punctata)
Canada Horseweed
(Conyza canadensis)
Black Huckleberry
(Gaylussacia baccata)
Box Huckleberry
(Gaylussacia brachycera)
Yellow Giant Hyssop
(Agastache nepetoides)