E-Flora BC: Electronic Atlas of the Flora of British Columbia

Erigeron strigosus Muhl. ex Willd. var. strigosus
rough-stemmed fleabane (prairie fleabane)
Asteraceae (Aster family)

Introduction to Vascular Plants
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Distribution of Erigeron strigosus var. strigosus
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Species Information

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Annual or rarely biennial herb from a fibrous root; stems erect, branched, finely-appressed straight-hairy, to moderately stiff long-hairy, sometimes almost glabrous, 30-70 cm tall.
Basal leaves mostly oblanceolate or elliptic, tapering to the stalks, entire or toothed, 2-15 cm long, 3-25 mm wide, often deciduous, hairy like the stems; stem leaves similar, becoming reduced upwards.
Heads with ray and disk flowers, several to numerous in an open inflorescence, the disk 5-12 mm wide; involucres 2-5 mm tall; involucral bracts finely and obscurely glandular and more or less hairy, subequal, abruptly sharp-pointed or with long-pointed tips, with brown midveins and light greenish or yellowish margins; ray flowers 50-100, white, sometimes pink or bluish, 2-6 mm long, 0.4-1.0 mm wide; disk flowers 1.5-2.6 mm long.
Achenes 2-nerved, hairy; pappus double, the inner of 10-15 fragile bristles, these lacking from the ray flowers, the outer of short bristles or scales.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry roadsides and disturbed areas in the lowland, steppe and montane zones; frequent in S BC, rare northward to Prince George; E to NF and S to FL and TX, native status uncertain.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Erigeron annuus subsp. strigosus (Muhl. ex Willd.) Wagenitz
Erigeron ramosus (Walter) Britton, Sterns & Poggenb.
Erigeron strigosus var. discoideus Robbins ex A. Gray
Erigeron strigosus var. eligulatus Cronquist
Erigeron strigosus var. typicus Cronquist
Erigeron traversii Shinners
Stenactis strigosa (Muhl. ex Willd.) DC.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References