Native Plants
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Monday - May 21, 2007
From: Victor, ID
Region: Rocky Mountain
Topic: Grasses or Grass-like
Title: Difference between Pseudoroegneria spicata and Elymus trachycaulus
Answered by: Joe Marcus
QUESTION:
What is the difference between Pseudoroegneria spicata and Elymus trachycaulus.ANSWER:
The differences are minor. The species of the genus Pseudoroegneria have been included in Elymus by some authorities. The most distinguishable morphological difference is in the awns of the lemmas of the two species. The awns of Pseudoroegneria spicata are typically sharply reflexed and diverge from the culm giving the plant a rather unkempt appearance, while the awns of Elymus trachycaulus - if present - are usually straight and are held more-or-less parallel to the culm. The Grass Manual on the Web is an excellent resource for more information on these and other North American grasses.More Grasses or Grass-like Questions
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