- Watershed & fisheries restoration, education, fuels reduction, &  invasive species management in the middle Klamath River subbasin, Northern California.Mid Klamath Watershed Council (MKWC)
Invasive Weeds of the Mid Klamath.  Photos courtesy of USDA.
   
 

introduction

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weed spotlight: meadow knapweed

invasive plant identification guide

 

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Invasive Plant Guide: Meadow Knapweed

 

Both Meadow knapweed & Spotted knapweed infestations occur in the Mid Klamath area.

Meadow Knapweed Flower
Meadow Knapweed Flower

Identifying characteristics

  • Flower color: white to purple
  • Plant spreads via rhizomes (underground roots), that run 2-6" below soil level, and seed. Vigorous colonizer of disturbed road side areas where a seed bank of plants exist nearby
  • Similar to Spotted knapweed

Occurrence

From 400-4000' elevation, adaptable to a variety of habitats. Moist areas, dry roadsides, in the shade or sun.

Indian Creek Road, north of Happy Camp, CA has patches of infestation along the road from mile markers 3 to 10. Fortunately there is only one place where a large infestation is growing near the Indian Creek (at the 10 mile mark).

Notes

If meadow knapweed seeds make it to the water they can be transported throughout the watershed in one high water event. Automobiles passing along this road after seed heads form are also likely to transport this weed throughout the watershed. This infestation threatens to spread downriver.

More Info

California Department of Food & Agriculture
www.cdfa.ca.gov/phpps/ipc/weedinfo/centaurea.htm
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