daisy fleabane

Erigeron strigosus var. calcicola is found in the central basin of Tennessee, northwest Georgia, northern Alabama, and southwest/central Kentucky. It grows in limestone glades. Erigeron strigosus var. dolomiticola is endemic to Bibb County, Alabama, and grows in calcareous glades. E. strigosus var. strigosus is distributed widely in North America and is found in disturbed areas, such as along roadsides, and open woodlands. E. strigosus var. septentrionalis is also found throughout much of North America and grows on roadsides and in other disturbed areas.

In part of its range Erigeron strigosus is found in tall grass prairie where fire is a regular part of the ecosystem. The cycle of fire initially causes a reduction of Erigeron strigosus, but it increases two to three years after fire. It often germinates in response to fire disturbance, and its germination rates are higher with fire disturbance than without. The cycle of fire also reduces the incidence of infections on Erigeron strigosus such as rust fungus Puccinia dioicae. Overall, increasing fire frequency has a positive effect on E. strigosus.