Dense blazing star is listed as a Canadian species of special concern due to loss of prairie and savanna habitat in Ontario.

This native relative of Liatris spicata is very rare in Ontario. For more information about the plant refer to Kansas Wildflowers and Grasses.

The bird's-foot violet inhabits savanna within deciduous forests of Ontario. It is considered a threatened species in Canada, where its small populations are isolated from those in the United States. A prescribed burn at Turkey Point Provincial Park to control succession of oak savanna has been beneficial to this plant.

See natural history notes at the North Prairie Wildlife Research Centre. Green milkweed is very rare in Ontario.

Tall green milkweed is extremely rare in Ontario.

See natural history notes at Discover Life. Spotted bee-balm is extremely rare in Ontario

Read this research article: Habitat requirements of lupine and the karner blue butterfly. Lupine is the only natural food source for larvae of the rare karner blue. The wildflower is rare to uncommon in Ontario savanna.

See natural history notes from the Northern Prairie Wildlife Research Centre. The prairie dock is extremely rare in Ontario.

Sullivant's milkweed or prairie milkweed is a very rare species of sandy prairie habitats in Ontario.

Natural history notes can be found at Kansas Wildflowers and Grasses.

A species of open oak and pine woods, sand prairie and dunes, goat's rue is threatened by shade from successional tree growth. It is listed as an endangered species in Canada.

The small white lady's slipper orchid has been extirpated from Saskatchewan and parts of it's former range in Ontario and Manitoba. Its threats include urbanization, agriculture, encroachment of forest, collection by plant enthusiasts, late spring frosts and competition by aggressive weed species. It is designated an endangered species in Canada.

An estimated 400 plants survive at two sites in Canada: Walpole Island and Ojibway Park in Ontario. It is an endangered species in Canada and through many parts of its range in the United States.

Threatened by habitat loss to agriculture, showy goldenrod is an endangered species in Canada, occuring only on Walpole Island, Ontario.

The tall or giant sunflower is a stikingly tall (2 to 3 m) plant that blooms in mid to late summer. The showy yellow flower heads (5 cm wide) attract pollinating insects.

A common grass in native tallgrass prairie, big bluestem is the state prairie grass of Illinois.

See natural history notes from the Northern Prairie Wildlife Research Center.

See species information on fringed brome at the Fire Effects Information System from USDA Forest Service.