| Aquilegia canadensis |
Wild columbine, Eastern red columbine |
Live plant |
| Aralia nudicaulis |
Wild sarsaparilla |
Live plant |
| Aralia racemosa |
Spikenard, American spikenard |
Live plant |
| Aralia spinosa |
Devil's walking-stick |
Live plant |
| Arisaema dracontium |
Green dragon |
Live plant |
| Arisaema triphyllum ssp. triphyllum |
Common jack-in-the-pulpit |
Live plant |
| Aristida purpurascens |
Purple three-awn grass, Arrow-feather, Three-awn grass |
Live plant |
| Arnoglossum atriplicifolium |
Pale indian-plantain |
Live plant |
| Aronia arbutifolia |
Red chokeberry |
Live plant |
| Aronia melanocarpa |
Black chokeberry |
Live plant |
| Aruncus dioicus var. dioicus |
Goat's-beard |
Live plant |
| Asarum canadense |
Common wild ginger |
Live plant |
| Asclepias amplexicaulis |
Clasping milkweed, Sand milkweed, Blunt-leaved milkweed |
Live plant |
| Asclepias exaltata |
Tall milkweed |
Live plant |
| Asclepias incarnata |
Swamp milkweed, Swamp butterfly weed, Marsh milkweed |
Live plant |
| Asclepias syriaca |
Common milkweed |
Live plant |
| Asclepias tuberosa |
Butterfly milkweed, Common butterfly weed, Butterfly weed, Common butterfly-weed |
Live plant |
| Asclepias variegata |
White milkweed |
Live plant |
| Asclepias verticillata |
Whorled milkweed |
Live plant |
| Asclepias viridiflora |
Green milkweed, Green-flowered milkweed, Green comet milkweed, Wand milkweed |
Live plant |
| Asimina triloba |
Pawpaw, Common pawpaw |
Live plant |
| Asplenium platyneuron |
Ebony spleenwort |
Live plant |
| Asplenium rhizophyllum |
Walking fern |
Live plant |
| Asplenium trichomanes ssp. trichomanes |
Maidenhair spleenwort |
Live plant |
| Astilbe biternata |
Appalachian false goat's-beard |
Live plant |