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?

Share

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

Sunday - August 23, 2009

From: Lexington, TX
Region: Southwest
Topic: Trees
Title: Scrub oaks dropping limbs in Lexington TX
Answered by: Barbara Medford

QUESTION:

We live in the country between Elgin and Lexington. One of our "scrub" oaks is dropping large limbs. On examination, the limbs have green leaves and they do not appear to be rotted. Do you think the cause is extreme lack of rain or disease?

ANSWER:

We are a little puzzled (as we usually are about common names) as to what plant you are referring to. We found four members of the Quercus (oak) genus with the common name "scrub oak" in our Native Plant Database, but only two of them are native even to Texas, and none to the actual area of Lee County you are referring to. These oaks are Quercus mohriana (Mohr oak), native to the Big Bend area and portions of the Panhandle, and Quercus turbinella (Sonoran scrub oak) which just shows up in a couple counties in the far western tip of Texas. 

Whatever the scientific name of the trees you are concerned with, there is no doubt that the heat and drouth are a contributing factor to many of the plant problems we are experiencing in Central Texas.  Whether that is the only cause of the problem or there is another cause, pest or disease, we have no way of knowing, that's a little out of our line. You can bet if you are having that trouble, others in your area are, too. The best way to contact an expert who not only knows what plant you have, but what is causing the problem and, hopefully, what to do about it is to go to this website for the Texas A&M AgriLIFE Extension Office for Lee County.

Pictures of Quercus turbinella (Sonoran scrub oak)

From our Native Plant Image Gallery


Quercus mohriana

Quercus mohriana

 

 

More Trees Questions

Native plants for under a pine tree in Vevay IN
June 29, 2009 - At our office we have a very nice garden however, in the front we have a large pine tree. We cannot get anything to take root & live there. Do you have any suggestions for a native shrub or perennia...
view the full question and answer

Is Magnolia virginiana (Sweetbay) a major nectar source for honeybees?
January 31, 2015 - Is the Sweetbay Magnolia a major nectar source for honeybees?
view the full question and answer

Has Texas Black Persimmon been crossed with non-native persimmons from Austin
August 17, 2013 - Hi. I just found a Texas Black Persimmon in my neighborhood. The fruit is olive green and then black, then it explodes into a black slurry of seeds and syrup. The color is so strong I find myself wond...
view the full question and answer

Shumard oak or live oak in Waco TX?
October 02, 2009 - Dear Mr Smarty Plants, I planted 2 small Shumard oaks in my front yard (east side of the house, 8-9 hours of sun per day) 18 months ago. Both had been purchased from a national chain store's garden ...
view the full question and answer

Red maple with burnt leaves in Buda TX
October 27, 2009 - I planted a red maple last fall. Planted in full sun here in Buda Texas. The leaves are yellowing and then they dry out completely almost looks burnt. Problem starts in middle of leaf and then works i...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center