En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Difference between Pseudoroegneria spicata and Elymus trachycaulus

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

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

Control methods for Cenchrus spinifex, Coastal sandbur
September 22, 2006 - I have some of the nicest, thickest, greenest grassburs in the county of Erath. What is the best and quickest way to get rid of them? I have heard of a product called cornmeal gluten. Any info appreci...
view the full question and answer

Lawn fertilizer in Austin
February 23, 2012 - My lawn person wants to spread granulated spring fertilizer on my lawn. Problem is I have a very old Live Oak tree that I do not want to kill. What should I avoid spreading on my lawn to prevent t...
view the full question and answer

Is Sedum recommended for a greenroof project in Houston
July 23, 2008 - Would you recommend using Sedum for a green roof project in Houston, Texas? Will the humidity effect the sedum? If sedum would be a poor choice, what would you recommend for Houston?
view the full question and answer

Controlling erosion with grasses in Dallas, TX
October 19, 2013 - After consulting with several geological engineers and the city of Dallas engineers - we know that our severe erosion problem can only be fixed by building a 35' foot high gabion wall about 150' in ...
view the full question and answer

Can Gulf Muhly grow in California from Walnut Creek CA
February 10, 2014 - I live in Walnut Creek, California, and recently learned about Muhlenbergia capillaris. It's a beautiful grass. Would this native do well here?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center