Invasive Plant Guide: Oblong Spurge

 

Euphorbia oblongata

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Hand-pulling Oblong Spurge

Identifying characteristics

  • Stems: ascending to erect, with fine white hairs
  • Leaves: oblong to narrowly elliptic, alternate,  3 inches long, broadly rounded leaf tips
  • Flower color: green to geenish-yellow
  • Bracts: yellow-green
  • Flowers: April to September
  • Plant height: 1-4 feet
  • Growth habit: perennial

Toxicity

All spurges exude a milky white latex.  This latex can cause severe skin reactions.  When handling oblong spurge, it is recommended to wear gloves and long sleeves and to avoid touching eyes after contact.

Occurrence

Oblong spurge can survive under a wide range of unfavorable plant conditions. In the mid-Klamath, it is commonly found in sandy soils on river bars, under partial shade of willows.

Populations of oblong spurge are contained to river bars around Somes Bar and Orleans.

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Oblong Spurge Fruiting

Notes

This plant is less aggressive than leafy spurge.  It does not reproduce by rhizome, but shows rapid distribution by seed.  It has a large taproot which can be difficult to remove completely.  Recommend hand pulling while soil is moist; this removal will be followed by an overwhelming amount of seedlings, some of which will reach maturity within the same year.

More Info

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