Index of plants by genus
| Species | Common Name | Family |
| Abies balsamea | Balsam Fir | Pinaceae |
| Acer negundo var. violaceum | Box Elder | Aceraceae |
| Acer pensylvaticum | Striped Maple | Aceraceae |
| Acer rubrum | Red Maple | Aceraceae |
| Acer saccharinum* | Silver Maple | Aceraceae |
| Acer saccharum* | Sugar Maple | Aceraceae |
| Acer spicatum | Mountain Maple | Aceraceae |
| Acorus calamus | Sweet Flag | Acoraceae |
| Adiantum pedatum | Maidenhair Fern | Pteridaceae |
| Adlumia fungosa* | Allegheny Vine | Fumariaceae |
| Agastache scrophulariifolia* | Purple Giant Hyssop | Lamiaceae |
| Aletris farinosa | White Colicroot | Liliaceae |
| Alisma subcordatum | Water Plantain | Alismataceae |
| Allium burdickii | Narrow-leaf Wild Leek | Liliaceae |
| Allium cernuum* | Prairie Onion | Liliaceae |
| Allium canadense* | Wild Garlic | Liliaceae |
| Allium tricoccum | Wild Leek | Liliaceae |
| Ambrosia trifida | Giant Ragweed | Asteraceae |
| Amorpha canescens | Leadplant | Leguminosae |
| Andromeda polifolia | Bog Rosemary | Ericaceae |
| Andropogon gerardii* | Big Bluestem | Poaceae |
| Andropogon scoparia* | Little Bluestem | Poaceae |
| Anemone canadensis | Canada Anemone | Ranunculaceae |
| Anemone virginiana | Tall Thimbleweed | Ranunculaceae |
| Anemone cylindrica | Thimbleweed | Ranunculaceae |
| Anemone patens var. wolfgangiana | Pasque Flower | Ranunculaceae |
| Anemone quinquefolia | Wood Anemone | Ranunculaceae |
| Angelica atropurpurea | Great Angelica | Apiaceae |
| Antennaria neglecta* | Field Pussytoes | Asteraceae |
| Apocynum cannabinum* | Indian Hemp, Dogbane | Apocynaceae |
| Aquilegia canadensis | Wild Columbine | Ranunculaceae |
| Arabis lyrata | Lyreleaf Rockcress | Brassicaceae |
| Aralia | ||
| Aralia | ||
| Arctostaphylos uva-ursi | Bearberry | Ericaceae |
| Arenaria caroliniana | Pinebarren Sandwort | Caryophyllaceae |
| Arenaria lateriflora | Bluntleaf Sandwort | Caryophyllaceae |
| Arenaria stricta | Stiff Sandwort | Caryophyllaceae |
| Arisaema dracontium | Green Dragon | Araceae |
| Arisaema triphyllum | Jack-in-the-Pulpit | Araceae |
| Aronia melanocarpa | Black chokeberry | Rosaceae |
| Aronia arbutifolia | Red Chokeberry | Rosaceae |
| Artemesia caudata* | Beach Wormwood | Asteraceae |
| Artemesia ludoviciana* | Prairie Sage | Asteraceae |
| Asarum canadense | Wild Ginger | Aristolochiaceae |
| Asclepias incarnata | Swamp Milkweed | Asclepiadaceae |
| Asclepias purpurascens | Purple Milkweed | Asclepiadaceae |
| Asclepias syriaca | Common Milkweed | Asclepiadaceae |
| Asclepias tuberosa | Butterflyweed | Asclepiadaceae |
| Asclepias verticillata | Whorled Milkweed | Asclepiadaceae |
| Asplenium platyneuron | Ebony Spleenwort | Aspleniaceae |
| Asplenium rhizophyllum* | Walking Fern | Aspleniaceae |
| Asplenium scolopendrium var. americanum* | Hart's Tonguefern | Aspleniaceae |
| Asplenium trichomanes | Maidenhair Spleenwort | Aspleniaceae |
| Aster laevis | Smooth Blue Aster | Asteraceae |
| Aureolaria grandiflora | Large Yellow False Foxglove | Scrophulariaceae |
© 2004 Michael Hough