Acicarpha
Acid-loving Sedge
Aethusa
African Amaranth
Airplant
Alabama Arrowwood
Alabama Blazing Star
Alabama Gladecress
Alabama Milkvine
Alabama Swamp Flatsedge
Alabama Warbonnet
Alder
Allegheny Hawkweed
Allegheny-spurge
Alligatorweed
Aloe Yucca
Alternateleaf Dogwood
American Barberry
American Bellflower
American Bittersweet
American Black Elderberry
American Burnweed
American Everlasting
American Ginseng
American Hazelnut
American Holly
American Hornbeam
American Nailwort
American Searocket
American Smoketree
American Spikenard
American Umbrellaleaf
American Water Plantain
American Water-willow
American Wild Carrot
Ammi
Angelica
Angularfruit Milkvine
Anisescented Goldenrod
Annual Marsh Elder
Annual Ragweed
Annual Seepweed
Annual Trampweed
Annual Wallrocket