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

Carduus acanthoides L.
plumeless thistle
Asteraceae (Aster family)

Introduction to Vascular Plants

© Odin Scholz  Email the photographer   (Photo ID #50271)

E-Flora BC Static Map
Distribution of Carduus acanthoides
Click here to view the full interactive map and legend
Details about map content are available here
New! Click on the map dots to view record details.

SUBTAXA PRESENT IN BC
Carduus acanthoides ssp. acanthoides

Species Information

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



General:
Biennial herb; stems spiny-winged, branched above, 0.3-1.5 m tall.
Leaves:
Basal leaves lacking; stem leaves narrowly elliptic or oblong in outline, deeply lobed or pinnately cut, up to 25 cm long and 8 cm wide, sparsely hairy on main veins, spiny-margined.
Flowers:
Heads discoid, 1.5-2.5 cm wide, clustered or solitary and erect at the ends of branches; involucres hemispheric; involucral bracts linear-lanceolate, in 2-3 series, somewhat leafy and spreading, outer ones spine-tipped; disk flowers usually purplish, sometimes cream or white, nearly 2 cm long.
Fruits:
Achenes glabrous, egg-shaped, with 15-20 dark longitudinal lines and a lighter collar at the tip; pappus whitish with minutely finely-barbed bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry fields, roadsides or waste places in the montane zone; rare in E BC; introduced from Europe.

Source: The Illustrated Flora of British Columbia

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References