Purple Starthistle

Centaurea calcitrapa

Plant Description

A biennial or perennial bushy thistle with finely hairy stems and leaves and purple to pink thistle-like blooms and bracts tipped with long straw colored spines. Its basal rosette with deeply divided leaves and a central cluster of spines.

Plant Details

Life Forms
ODA Listing
Soil and Moisture Conditions
Suggested Actions
Shade Preference
Mature Height 2-3'
Distribution Found extensively in California and in a few counties in Oregon and Washington.
Control If you find this plant, report it to OregonInvasivesHotline.org.
Reproduction and Spread Reproduces by seeds which are dispersed by the movement of vehicles, equipment, soil, apparel, and animals.
Introduced Native to southern Europe, introduced to California in the early 1900s.
Look Alikes Other Centaurea species (knapweeds and starthistles)
Impact Invades pastures, Meadows, and fields and displaces desirable forage plants. Unpalable so it increases as palatble plants are consumed. Creates impenetrable stands.
More Info
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