Scientific Name: Centaurea stoebe Form: Oval - vertical
Common Name:spotted knapweed Texture:Medium - fine
Family Name:AsteraceaeHabit: Open, Upright
Plant Type: Invasive plant, Biennial, Herbaceous perennial Mature Size (ht. X w.):0.7 - 1.3m x 0.3 - 0.6m
Origin: U.S. - northwest, U.S. - southwest, Europe Hardiness Zone:Zone 5: (-29 to -23 C)
Leaves: Dissected, Lobed, Simple, Alternate, Basal, Soft flexible, Pinnate venation, Pubescent, Odd-pinnate, Elliptic, Pinnately lobed
Flowers: Head (capitulum), Pink, Purple, Jun- Jul- Aug- Sep
Fruit: Achene, Brown, Aug- Sep- Oct
Exposure:
Soil or Media:
Landscape Uses:
Key ID Features:Leaves basal in its first year, deeply lobed to pinnified, once or twice on both sides of the center vein, with lobes oblong and wider toward the tip, up to 20 cm long x 5 cm wide; flower heads purple to pink, rarely white, with 25 to 35 florets per head, bracts have black margins or "spots", inflorescence 20 cm to over 1 m tall, branching with leaf-like bracts.