 Angelica atropurpurea (Purple-Stemmed Angelica) |
 Antennaria plantaginifolia (Plantain-Leaved Pussytoes) |
 Antennaria species (Pussytoes) |
 Apios americana (Groundnut) |
 Aplectrum hyemale (Puttyroot) |
 Apocynum androsaemifolium (Spreading Dogbane) |
 Apocynum cannabinum (Indian Hemp) |
 Aquilegia canadensis (Wild Columbine) |
 Arabidopsis lyrata (Lyre-Leaved Rock Cress) |
 Aralia hispida (Bristly Sarsaparilla) |
 Aralia nudicaulis (Wild Sarsaparilla) |
 Aralia racemosa (Spikenard) |
 Aralia spinosa (Devil's Walking-Stick) |
 Aralia spinosa (Devil's Walking-Stick) - Large Cluster |
 Arctostaphylos uva-ursi (Bearberry) |
 Arethusa bulbosa (Dragon’s-Mouth) |
 Arisaema dracontium (Green Dragon) |
 Arisaema triphyllum (Jack-in-the-Pulpit) |
 Arisaema triphyllum (Jack-in-the-Pulpit) - Black Spadix |
 Arisaema triphyllum (Jack-in-the-Pulpit) - Green Spadix |
 Aristida longespica (Slim-Spike Three-Awn) |
 Aristolochia serpentaria (Virginia Snakeroot) |
 Arnoglossum atriplicifolium (Pale Indian-Plantain) |
 Aronia species (Chokeberry) |
 Artemisia campestris (Beach Wormwood) |
 Aruncus dioicus (Goatsbeard) |
 Aruncus dioicus (Goatsbeard) - Close View |
 Asarum canadense (Wild Ginger) |
 Asclepias exaltata (Poke Milkweed) |
 Asclepias incarnata (Swamp Milkweed) |
 Asclepias quadrifolia (Four-Leaved Milkweed) |
 Asclepias sullivantii (Sullivant's Milkweed) |
 Asclepias syriaca (Common Milkweed) |
 Asclepias tuberosa (Butterfly Milkweed) - Orange Flowers |
 Asclepias tuberosa (Butterfly Milkweed) - Yellow Flowers |
 Asclepias verticillata (Whorled Milkweed) |
 Asclepias viridiflora (Green Comet Milkweed) |
 Asimina triloba (Pawpaw) |
 Astragalus canadensis (Canada Milk-Vetch) |
 Aureolaria flava (Smooth Yellow False Foxglove) |
 Aureolaria flava (Smooth Yellow False Foxglove) - Side View |
 Aureolaria pedicularia (Fern-Leaved Yellow False Foxglove) |
 Baptisia australis (Blue Wild Indigo) |
 Baptisia tinctoria (Yellow Wild Indigo) |
 Bartonia paniculata (Panicled Bartonia) |
 Bartonia virginica (Yellow Bartonia) |
 Betula alleghaniensis (Yellow Birch) |
 Bidens trichosperma (Northern Tickseed-Sunflower) |
 Bidens beckii (Beck's Water-Marigold) |
 Bidens bipinnata (Spanish Needles) |