| Scientific Name: | Centaurea stoebe |
| Common Name: | spotted knapweed |
| Family Name: | Asteraceae |
| Origin: | Europe, U.S. - northwest, U.S. - southwest |
| Hardiness Zone: | Zone 3: (-40 to -34 °C) |
| Plant Type: | Biennial, Herbaceous perennial, Invasive plant |
| Mature Size: | 0.7 - 1.3m x 0.3 - 0.6m (height x width) |
| Habit: | Open, Upright |
| Form: | Oval - vertical |
| Texture: | Medium - fine |
| Landscape Uses: | |
| Exposure: | Full sun |
| Soil or Media: | |
| Leaves: | Simple, Lobed, Dissected, Alternate, Basal, Soft flexible, Pinnate venation, Pubescent, Odd-pinnate, Elliptic, Pinnately lobed |
| Flowers: | Head (capitulum), Purple, Pink, Jun-Jul-Aug-Sep |
| Fruit: | Achene, Brown, Aug-Sep-Oct |
| Key ID Features: | |
| Basal leaves in 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 20cm long x 5cm wide; stalked; flowering stem leaves sessile, usually pinnately lobed 4-7cm long; flower heads purple to pink, rarely white, with 25 to 35 florets per head, bracts have black margins or "spots", arranged in a corymb-like inflorescence 20-90cm tall, branching with leaf-like bracts; achenes dark grey-black, 2.5-3.5 mm long; pappus white, 0.5-2 mm long. | |