| Family |
Taxon |
Common Name | Photographs |
| Euphorbiaceae |
Acalypha rhomboidea Raf. |
rhombic copper-leaf, three-seeded-mercury |
|
| Aceraceae |
Acer negundo L. |
ash-leaved maple, box elder |
|
| Aceraceae |
Acer negundo L. var. negundo |
box elder |
|
| Aceraceae |
Acer negundo L. var. violaceum (Kirchn.) H.Jaeger |
box elder |
|
| Aceraceae |
Acer saccharum Marshall var. saccharum |
hard maple, sugar maple |
|
| Aceraceae |
Acer spicatum Lam. |
mountain maple |
|
| Asteraceae |
Achillea millefolium L. |
common yarrow, milfoil |
|
| Asteraceae |
Achillea millefolium L. subsp. lanulosa (Nutt.) Piper |
common yarrow, milfoil |
|
| Ranunculaceae |
Aconitum columbianum Nutt. subsp. columbianum |
Columbian monk's-hood |
|
| Ranunculaceae |
Actaea pachypoda Elliott |
doll's-eyes, white baneberry |
|
| Ranunculaceae |
Actaea rubra (Aiton) Willd. |
red baneberry |
|
| Pteridaceae |
Adiantum pedatum L. |
maidenhair fern, northern maidenhair fern |
|
| Scrophulariaceae |
Agalinis gattingeri (Small) Small |
round-stem foxglove, round-stemmed false foxglove |
|
| Rosaceae |
Agrimonia gryposepala Wallr. |
common agrimony, tall hairy agrimony |
|
| Rosaceae |
Agrimonia pubescens Wallr. |
downy agrimony, soft agrimony |
|
| Poaceae |
Agrostis gigantea Roth |
redtop |
|
| Betulaceae |
Alnus incana (L.) Moench subsp. rugosa (Du Roi) R.T.Clausen |
mountain alder, speckled alder, swamp alder |
|
| Amaranthaceae |
Amaranthus retroflexus L. |
common amaranth, pigweed, redroot, rough amaranth, rough pigweed, wild-beet amaranth |
|
| Rosaceae |
Amelanchier interior Nielsen |
inland Juneberry, inland serviceberry, Pacific serviceberry |
|
| 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 |
Amphicarpaea bracteata (L.) Fernald |
American hog-peanut, hog-peanut |
|
| Ranunculaceae |
Anemone acutiloba (DC.) G.Lawson |
sharp-lobed hepatica |
|
| Ranunculaceae |
Anemone americana (DC.) H.Hara |
round-lobed hepatica |
|
| Ranunculaceae |
Anemone canadensis L. |
Canada anemone, Canadian anemone, meadow anemone |
|
| Ranunculaceae |
Anemone cylindrica A.Gray |
candle anemone, long-headed anemone, thimbleweed |
|
| 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. virginiana |
tall anemone, tall thimbleweed |
|
| Apiaceae |
Angelica atropurpurea L. |
common great angelica, great angelica, purple-stem angelica |
|
| Apiaceae |
Angelica atropurpurea L. var. occidentalis Fassett |
purple-stem angelica, western great angelica |
|
| 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 parlinii Fernald subsp. parlinii |
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 androsaemifolium L. |
spreading dogbane |
|
| Ranunculaceae |
Aquilegia canadensis L. |
Canadian columbine, red columbine, wild columbine |
|
| Brassicaceae |
Arabis canadensis L. |
sickle-pod |
|
| 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 hispida Vent. |
bristly sarsaparilla |
|
| Araliaceae |
Aralia nudicaulis L. |
wild sarsaparilla |
|
| Araliaceae |
Aralia racemosa L. |
American spikenard, life-of-man |
|
| Asteraceae |
Arctium minus Bernh. |
common burdock, lesser burdock |
|
| Araceae |
Arisaema triphyllum (L.) Schott subsp. triphyllum |
Indian turnip, Jack-in-the-pulpit |
|
| Asteraceae |
Arnoglossum plantagineum Raf. |
prairie Indian-plantain |
|