Centaurea nigrescens Willd.
short-fringed knapweed (Tyrol knapweed)
Asteraceae (Aster family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #7552)


E-Flora BC Static Map

Distribution of Centaurea nigrescens
Click here to view the full interactive map and legend

Species Information

Perennial herb from a taproot; stems erect, branched, glabrous or somewhat sparsely long-hairy, 0.4-1.0 m tall.
Basal leaves oblanceolate to elliptic, base tapering into the stalk, deeply to shallowly lobed or irregularly pinnately cut, glabrous or often lightly hairy below, up to 15 cm long and 3 cm wide; stem leaves lanceolate, unstalked, reduced upwards.
Heads discoid, numerous, solitary at the ends of ascending branches; disk flowers reddish-purple, the marginal ones, if present, enlarged, lobed and conspicuous; involucres 12-15 mm tall, 8-11 mm wide; involucral bracts cylindric, taller than wide, with slightly enlarged, rounded, tattered to comb-like, darker appendages at the tips, these wider than the bracts.
Achenes grey or light brown, 3.2-3.5 mm long; pappus reduced to small scales or lacking.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Mesic roadsides and fields in the lowland zone; rare in SW BC (Saanich Peninsula, Vancouver Island) and SC BC (Mara Lake area); introduced from Europe.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Centaurea debeauxii subsp. thuillieri Dostál
Centaurea dubia subsp. vochinensis (Bernh. ex Rchb.) Hayek
Centaurea pratensis Thuill., nom. illeg., non Salisb.
Centaurea vochinensis Bernh. ex Rchb.