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

Centaurea stoebe subsp. australis L.
Asteraceae (Aster family)

Introduction to Vascular Plants

© Eileen Brown  Email the photographer   (Photo ID #10423)

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Distribution of Centaurea stoebe subsp. australis
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Species Information

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Biennial or sometimes perennial herb from a taproot; stems erect, ridged, laxly branched, 0.2-1.8 m tall.
Basal leaves pinnately cut, linear, stalked; stem leaves becoming reduced and unstalked above.
Heads discoid, few to several, in a corymb-like arrangement at the ends of ascending branches; involucres 9-13 mm tall, 6-8 mm wide; involucral bracts oblong, grooved, membranous, the middle and outer ones bearing a relatively narrow, darkened comb-like tip; disk flowers purple to pinkish-purple, rarely white, the sterile marginal ones 18-20 mm long, enlarged at the tips with 5 narrow lobes, the central perfect ones 12-16 mm long.
Achenes dark grey to black, 2.5-3.5 mm long; pappus white, 0.5-2 mm long, rarely lacking.
This species is sometimes difficult to separate from the closely related C. paniculata. The latter, however, has much stiffer, divergent branches that are often again branched with narrower heads.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry roadsides and fields in the steppe and montane zones; frequent in S BC east of the Coast-Cascade Mountains; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References