En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?


Ask Mr. Smarty Plants

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


What is the difference between Pseudoroegneria spicata and Elymus trachycaulus.


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

Native turf grass for acreage in Denison TX
January 27, 2014 - I have recently moved to Denison TX where we have 5+ acres of true crosstimbers land. I am looking for a native turf grass that will do well in sandy soil and with the water provided by nature. The m...
view the full question and answer

Identity of grass-like plant with white or cream flowers in The Woodlands, TX?
May 16, 2015 - What is the name of the tall grass-like plant with small white or cream flowers that is planted in most esplanades in The Woodlands, TX.?
view the full question and answer

Grass for miniature horses
October 31, 2008 - We are looking for buffalo grass or a grass that can be eaten by miniature horses. We have a small non-profit in south Austin and bring the minis home on weekends x2 a month. Our yard has been dirt w...
view the full question and answer

Rejuvenating old Lindheimer muhly clumps
October 02, 2015 - I've got two clumps of Lindheimer's muhly in full sun in the western (limestone) part of Austin. I'm thinking they've been there for the past 8 or so years. In the past two or three years, the g...
view the full question and answer

Shade grasses for central Texas
November 16, 2014 - We are new to the area and bought a home this summer that has lots of shade in the very small backyard. The problem is that there was new sod laid in the backyard which now is 50% dead. We do not kno...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2015 Lady Bird Johnson Wildflower Center