Greater Knapweed

Plant Bio

Common Name:Greater knapweed
Family:Asteraceae
Genus:Centaurea
Species:scabiosa
Classification/Rank:Extremely Invasive
Method of Transportation:
Habitat/Range:• two sites reported east of Burns Lake, and one in Telkwa in 1997; may have been first record of this knapweed in BC

Description

• perennial herb that rows 0.3 to 1.5 m tall
• stems erect, densely branched; branches green, five angled, sparsely black hairy, tipped with spines
• basal leaves egg-shaped in outline, deeply irregularly pinnately segmented with narrow, lance shaped segments; stem leaves broader, reduced upwards
• flowers are purple; heads discoid, few to several on ascending branches; bracts egg to lance shaped, black or brown

News

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posted: November 7, 2018
2017 Annual Report from NWIPC is now online

NWIPC's Annual Report for 2017 was released at our AGM in Smithers in October 2018. Check it out here.

posted: November 3, 2018
WeedsBMP App for Forage and Livestock Producers Now Available

Land owners and managers have long recognized the need to control invasive plants to limit their impacts. In May 2018, a new smartphone app...