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

Rhaponticum repens (L.) Hidalgo
Russian knapweed (hardheads)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Reg Newman  Email the photographer   (Photo ID #12117)

E-Flora BC Static Map
Distribution of Rhaponticum repens
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Perennial herb from a rhizome; stems erect, openly branched, densely woolly-hairy, 0.2-1.0 m tall.
Basal leaves oblanceolate, irregularly pinnately-lobed to entire, 3-10 cm long, 1.0-2.5 cm wide; lower stem leaves smaller, pinnately-lobed; upper stem leaves linear to narrowly lanceolate, entire or saw-toothed.
Heads with ray and disk flowers; involucres 9-15 mm tall; involucral bracts in several unequal series, entire, more or less soft-hairy with widely papery tips; ray flowers white to blue, 12-16 mm long; receptacles bristly.
Achenes egg-shaped, 3-4 mm long, slightly compressed, glabrous; pappus of many bristles barbed below, feathery above, more or less deciduous.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry roadsides and disturbed areas 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

Synonyms and Alternate Names

Acroptilon repens
Centaurea picris Pallas ex Willd.
Centaurea repens

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References