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| Photo
by Renee Brecht |
Britton and Brown. See
credits below.** |
| Botanical name: |
Centaurea stoebe L. ssp. micranthos (Gugler) Hayek |
| Common
name: |
spotted knapweed |
| Group: |
dicot |
| Family: |
Asteraceae |
| Growth
Type: |
forb/herb |
| Duration: |
biennial, perennial |
| Origin: |
introduced |
| Plant
height: |
12-60" |
| Foliage: |
heavily dissected, pinnately compound |
| Flowers: |
pinkish purple, solitary; involucral bracts without widened tip |
| Flowering/fruiting time |
late June to October |
| Habitat: |
weed of dry disburbed ground of fields, roadsides |
| Range
in
New Jersey: |
statewide and increasing |
| Heritage ranking if any: |
n/a |
| Distribution: |
 |
| Misc.: |
Introduced in the 1890s as seeds mixed with alfalfa. Dispersed by seed,
animals, birds, and rodents. There are no known wildlife benefits and is
considered an invasive weed. Four species of Centaurea grow in NJ, all
invasive, with this being the most common.
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Sources
**USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 314. |
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