| Family |
Taxon |
Common Name | Photographs |
| Malvaceae |
Abutilon theophrasti Medik. |
piemarker, velvet-leaf |
|
| Aceraceae |
Acer negundo L. |
ash-leaved maple, box elder |
|
| Aceraceae |
Acer negundo L. var. violaceum (Kirchn.) H.Jaeger |
box elder |
|
| Aceraceae |
Acer rubrum L. var. rubrum |
red maple |
|
| Aceraceae |
Acer saccharinum L. |
silver maple, soft maple |
|
| Asteraceae |
Achillea millefolium L. |
common yarrow, milfoil |
|
| Asteraceae |
Achillea millefolium L. subsp. lanulosa (Nutt.) Piper |
common yarrow, milfoil |
|
| Ranunculaceae |
Actaea rubra (Aiton) Willd. |
red baneberry |
|
| Pteridaceae |
Adiantum pedatum L. |
maidenhair fern, northern maidenhair fern |
|
| Poaceae |
Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. |
southern hair grass, tickle grass, winter bent grass |
|
| Poaceae |
Agrostis perennans (Walter) Tuck. var. perennans |
autumn bent grass, thin grass, upland bent grass |
|
| Alismataceae |
Alisma triviale Pursh |
northern water-plantain |
|
| Amaranthaceae |
Amaranthus retroflexus L. |
common amaranth, pigweed, redroot, rough amaranth, rough pigweed, wild-beet amaranth |
|
| Amaranthaceae |
Amaranthus tuberculatus (Moq.) J.D.Sauer |
rough-fruited amaranth, rough-fruited water-hemp, tall water-hemp |
|
| Asteraceae |
Ambrosia artemisiifolia L. |
annual bur-sage, common ragweed, short ragweed |
|
| Asteraceae |
Ambrosia psilostachya DC. |
perennial ragweed, western ragweed |
|
| Rosaceae |
Amelanchier laevis Wiegand |
Allegheny serviceberry, Allegheny shadblow, smooth serviceberry |
|
| Rosaceae |
Amelanchier sanguinea (Pursh) DC. var. sanguinea |
low shadblow, New England serviceberry, round-leaved serviceberry |
|
| Fabaceae |
Amorpha canescens Pursh |
lead-plant |
|
| Fabaceae |
Amorpha fruticosa L. |
desert indigo-bush, false indigo, indigo-bush |
|
| Fabaceae |
Amphicarpaea bracteata (L.) Fernald |
American hog-peanut, hog-peanut |
|
| Poaceae |
Andropogon gerardii Vitman |
big blue-stem, turkey-foot |
|
| Ranunculaceae |
Anemone canadensis L. |
Canada anemone, Canadian anemone, meadow anemone |
|
| Ranunculaceae |
Anemone patens L. var. multifida Pritz. |
American pasqueflower, prairie-smoke |
|
| Ranunculaceae |
Anemone quinquefolia L. var. quinquefolia |
nightcaps, wood anemone |
|
| Ranunculaceae |
Anemone virginiana L. |
tall anemone, tall thimbleweed |
|
| Ranunculaceae |
Anemone virginiana L. var. alba (Oakes) A.W.Wood |
tall anemone, thimbleweed |
|
| Asteraceae |
Antennaria neglecta Greene |
cat's-foot, field pussy-toes |
|
| Asteraceae |
Antennaria parlinii Fernald |
Parlin's pussy-toes, plantain pussy-toes |
|
| Asteraceae |
Antennaria parlinii Fernald subsp. fallax (Greene) R.J.Bayer & Stebbins |
Parlin's pussy-toes, plantain pussy-toes |
|
| Asteraceae |
Antennaria plantaginifolia (L.) Richardson |
plantain pussy-toes, plantain-leaved pussy-toes, woman's-tobacco |
|
| Asteraceae |
Anthemis cotula L. |
dog-fennel, mayweed, stinking chamomile, stinking-cotula |
|
| Apocynaceae |
Apocynum cannabinum L. |
hemp-dogbane, Indian hemp |
|
| Ranunculaceae |
Aquilegia canadensis L. |
Canadian columbine, red columbine, wild columbine |
|
| Brassicaceae |
Arabis drummondii A.Gray |
Drummond's rock-cress |
|
| Brassicaceae |
Arabis glabra (L.) Bernh. |
tower mustard, tower rock-cress |
|
| Brassicaceae |
Arabis laevigata (Muhl. ex Willd.) Poir. var. laevigata |
smooth bank-cress, smooth rock-cress |
|
| Brassicaceae |
Arabis lyrata L. |
lyrate rock-cress, sand cress |
|
| Araliaceae |
Aralia nudicaulis L. |
wild sarsaparilla |
|
| Araliaceae |
Aralia racemosa L. |
American spikenard, life-of-man |
|
| Asteraceae |
Arctium minus Bernh. |
common burdock, lesser burdock |
|
| Ericaceae |
Arctostaphylos uva-ursi (L.) Spreng. |
bearberry, kinnickinnick |
|
| Araceae |
Arisaema dracontium (L.) Schott |
dragon-root, green dragon |
|
| Araceae |
Arisaema triphyllum (L.) Schott subsp. triphyllum |
Indian turnip, Jack-in-the-pulpit |
|
| Poaceae |
Aristida basiramea Engelm. ex Vasey |
fork-tip three-awn grass |
|
| Poaceae |
Aristida tuberculosa Nutt. |
beach three-awn, dune three-awn grass, seaside three-awn |
|
| Asteraceae |
Artemisia biennis Willd. |
biennial sage-wort, biennial wormwood |
|
| Asteraceae |
Artemisia ludoviciana Nutt. subsp. ludoviciana |
Louisiana sage-wort, western mugwort, white sage |
|
| Rosaceae |
Aruncus dioicus (Walter) Fernald var. acuminatus (Rydb.) Rydb. ex Hara |
bride's-feathers, goat's-beard |
|
| Asclepiadaceae |
Asclepias incarnata L. subsp. incarnata |
swamp milkweed |
|