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

Crepis tectorum L.
annual hawksbeard (narrowleaf hawksbeard)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Paul Handford  Email the photographer   (Photo ID #65309)

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Distribution of Crepis tectorum
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Species Information

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Annual herb from a short taproot; stems erect, solitary, branched, glabrous or hairy, 0.3-1.0 m tall.
Basal leaves lanceolate or oblanceolate, 2-15 cm long, 0.3-4 cm wide entire to toothed or pinnately parted, abruptly sharp-pointed, short stalked, glabrous or short-hairy, often soon deciduous; stem leaves unstalked, clasping, mostly linear or nearly so, often involute.
Heads with strap-shaped flowers several to numerous, in a flat-topped inflorescence; involucres 6-9 mm tall, cylindric to bell-shaped; involucral bracts short woolly-hairy and sometimes stiff glandular-hairy, the outer ones about 12, awl-like, about a third as long as the 12-15 inner ones, these lanceolate, with long-pointed tips, becoming keeled and thickened near the base, appressed- or short-hairy within; receptacles very finely-fringed with small hairs; ray flowers yellow, up to 13 mm long.
Achenes purplish-brown, 2.5-4.5 mm long, spindle-shaped, rather strongly tapering to a slender tip, scarcely beaked, 10-ribbed, ribs rough short-hairy; pappus white, of fine, hairlike bristles, deciduous.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Roadsides and disturbed areas in the lowland, steppe and montane zones; frequent throughout BC, except NW BC and the Queen Charlotte Islands; introduced from Europe.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Crepis tectorum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 350 837 1587
Slope Gradient (%) 0 20 95
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
4 48 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 6
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(22), BWBS(2), ICH(2), IDF(40), MS(2), PP(5), SBS(3)


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.

Taxonomic and Nomenclatural Links

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General References