| Family |
Taxon |
Common Name | Photographs |
| Aceraceae |
Acer negundo L. |
ash-leaved maple, box elder |
|
| Aceraceae |
Acer negundo L. var. violaceum (Kirchn.) H.Jaeger |
box elder |
|
| Aceraceae |
Acer saccharinum L. |
silver maple, soft maple |
|
| Aceraceae |
Acer saccharum Marshall var. saccharum |
hard maple, sugar maple |
|
| Anacardiaceae |
Toxicodendron rydbergii (Small ex Rydb.) Greene |
Rydberg's poison-ivy, western poison-ivy |
|
| Apiaceae |
Cryptotaenia canadensis (L.) DC. |
Canadian honewort, white chervil |
|
| Apiaceae |
Heracleum lanatum Michx. |
American cow-parsnip |
|
| Apiaceae |
Osmorhiza claytonii (Michx.) C.B.Clarke |
bland sweet cicely, Clayton's sweet-root, hairy sweet cicely |
|
| Apiaceae |
Osmorhiza longistylis (Torr.) DC. |
anise-root, long-styled sweet cicely, long-styled sweet-root, smooth sweet cicely |
|
| Apiaceae |
Pastinaca sativa L. |
wild parsnip |
|
| Apiaceae |
Pimpinella saxifraga L. |
solid-stem burnet-saxifrage |
|
| Apiaceae |
Sanicula gregaria E.P.Bicknell |
clustered black snakeroot |
|
| Apiaceae |
Sanicula marilandica L. |
black snakeroot, Maryland sanicle |
|
| Apiaceae |
Taenidia integerrima (L.) Drude |
yellow-pimpernel |
|
| Apiaceae |
Zizia aurea (L.) W.D.J.Koch |
common golden alexanders, golden alexanders, golden zizia |
|
| Apocynaceae |
Apocynum androsaemifolium L. |
spreading dogbane |
|
| Apocynaceae |
Apocynum cannabinum L. |
hemp-dogbane, Indian hemp |
|
| Araceae |
Arisaema triphyllum (L.) Schott subsp. triphyllum |
Indian turnip, Jack-in-the-pulpit |
|
| Araceae |
Symplocarpus foetidus (L.) Salisb. ex W.P.C.Barton |
skunk-cabbage |
|
| Araliaceae |
Aralia nudicaulis L. |
wild sarsaparilla |
|
| Asclepiadaceae |
Asclepias lanuginosa Nutt. |
side-cluster milkweed, woolly milkweed |
|
| Asclepiadaceae |
Asclepias purpurascens L. |
purple milkweed |
|
| Asteraceae |
Achillea millefolium L. |
common yarrow, milfoil |
|
| Asteraceae |
Achillea millefolium L. subsp. lanulosa (Nutt.) Piper |
common yarrow, milfoil |
|
| Asteraceae |
Ambrosia artemisiifolia L. |
annual bur-sage, common ragweed, short ragweed |
|
| 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 |
Arnoglossum plantagineum Raf. |
prairie Indian-plantain |
|
| Asteraceae |
Aster drummondii Lindl. |
Drummond's aster, hairy heart-leaved aster |
|
| Asteraceae |
Aster ericoides L. |
heath aster, squarrose white aster, white prairie aster |
|
| Asteraceae |
Aster ericoides L. var. prostratus (Kuntze) S.F.Blake |
prostrate heath aster |
|
| Asteraceae |
Aster ericoides L. X A. sericeus Vent. |
|
|
| Asteraceae |
Aster laevis L. var. laevis |
smooth aster, smooth blue aster |
|
| Asteraceae |
Aster lateriflorus (L.) Britton |
calico aster, goblet aster, side-flowering aster |
|
| Asteraceae |
Aster novae-angliae L. |
New England aster |
|
| Asteraceae |
Aster oblongifolius Nutt. |
aromatic aster |
|
| Asteraceae |
Aster oolentangiensis Riddell |
azure aster, prairie heart-leaved aster, sky-blue aster |
|
| Asteraceae |
Aster pilosus Willd. |
awl aster, frost aster, hairy aster, white old-field aster |
|
| Asteraceae |
Aster pilosus Willd. var. pilosus |
awl aster, frost aster, hairy aster, white old-field aster |
|
| Asteraceae |
Aster pilosus Willd. X A. sagittifolius Wedem. ex Willd. |
|
|
| Asteraceae |
Aster sagittifolius Wedem. ex Willd. |
arrow-leaved aster |
|
| Asteraceae |
Carduus acanthoides L. |
plumeless thistle, spiny plumeless thistle |
|
| Asteraceae |
Centaurea biebersteinii DC. |
spotted knapweed |
|
| Asteraceae |
Cirsium arvense (L.) Scop. |
Canada thistle, creeping thistle, field thistle |
|
| Asteraceae |
Cirsium discolor (Muhl. ex Willd.) Spreng. |
field thistle, pasture thistle, prairie thistle |
|
| Asteraceae |
Cirsium hillii (Canby) Fernald |
Hill's thistle, hollow-rooted thistle, prairie thistle |
|
| Asteraceae |
Cirsium vulgare (Savi) Ten. |
bull thistle |
|
| Asteraceae |
Erigeron pulchellus Michx. var. pulchellus |
Robin's-plantain |
|