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

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