||It has been suggested that Hesperostipa spartea be merged into this article. (Discuss) Proposed since January 2017.|
Hesperostipa spartea - (Trin.) Barkworth
Stipa spartea or Hesperostipa spartea is native to the Great Plains and Canadian Prairies of North America. It is also found in grasslands of the Rocky Mountains in Western Canada and the Western United States.
The seeds are needle-like with sharp tips and long tails. The tails are composed of two different strands that dry at different rates and twist around each other, causing the sharp head of the seed to be driven into the soil. Just behind the sharp, needle-like tip, is a collar of long thick hairs that face backward, preventing the seeds from working their way back out of the soil.
This species of grass can have its seeds entangled in sheep's hair while they are feeding, and once entangled it often works its way into the animal's skin.
Media related to Hesperostipa spartea at Wikimedia Commons
- USDA Plants Profile for Hesperostipa spartea (Porcupinegrass)
- Lady Bird Johnson Wildflower Center Native Plant Information Network (NPIN) — Hesperostipa spartea (Porcupine grass)
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