- 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.
   
 

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invasive plant identification guide

 

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Invasive Plant Guide: Leafy Spurge

 

Leafy spurge

Leafy Spurge Flower
Leafy Spurge Flower

Identifying characteristics

  • Stems: erect, glabrous or hairy
  • Leaves: linear to narrowly oblanceolate, alternate,  3 inches long, 1/4 inch wide, tips acute or rounded, margins smooth
  • Flower color: green to geenish-yellow
  • Bracts: yellow-green
  • Flowers: June to September
  • Plant height: 1-3 feet
  • Growth habit: perennial
Leafy Spurge Plant
Leafy Spurge Plant

Occurrence

Leafy spurge can survive under a wide range of unfavorable plant conditions. However it spreads most rapidly in areas where cattle or other grass-preferring animals remove competing plants, permitting leafy spurge to take over by utilizing the advantages of shooting seeds and invading roots.

Notes

Plants can send rhizomes (underground roots) up to 8' underground, making this plant extremely difficult to control if left untreated. Any part of the root that remains in the soil after an attempted digging will sprout a new shoot that same year, or the following year. A very hot plant on the California Department of Food and Agriculture's Noxious Weed List. Herbicide treated patches have been found on the Klamath River.

More Info

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