Native Plants

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.
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.

rate this answer

Monday - September 23, 2013
From: Spicewood, TX
Region: Southwest
Topic: Plant Identification
Title: New thorn/bush tree in Central Texas
Answered by: Nan Hampton
QUESTION:
In Central Texas, over the last 5 years we have seen a new variety of thorn bush appear. It has very long thorns much like mesquite tree but thorns are every inch or so along the branches. The tree is like a bush but will grow 20 or more feet high. The color of the tree is almost a blue green.ANSWER:
My best guess from your description is Zanthoxylum hirsutum (Texas hercules' club). Here are photos and more information from Archive of Central Texas Plants from the School of Biological Sciences, University of Texas. Crushed leaves give off an odor that smells like oranges or other citrus fruits. If you chew one of the leaves (the young leaves, in particular), you will notice that your tongue begins to feel numb. Native Americans used the leaves to treat toothache; thus, its common names of Tickle-tongue and Toothache tree.
Other possibilities are:
Ziziphus obtusifolia (Lotebush) Here are photos and more information from Texas A&M Horticulture and Virginia Tech University.
Castela erecta (Goatbush) Here is a description from the US Forest Service and here are photos and more information from Texas A&M Horticulture and photos from Flora of Dolan Falls Preserve in Val Verde County, Texas.
Sideroxylon lanuginosum (Gum bumelia) Here are photos and more information from the Archive of Central Texas Plants from the School of Biological Sciences, University of Texas.
From the Image Gallery
More Plant Identification Questions
Looking for the identification of spice or cinnamon bush
May 30, 2011 - My grandmother had a flowering bush that had little yellow flowers on it and smelled like cinnamon to me. She called it a spice bush. Could you help me name that bush?
view the full question and answer
Plant identification
September 04, 2010 - Please identify this tree: has leaves like a catalpa, blue/lavender flowers on a long flower spike at the end of the limb, green fruit/seed about the size of a pecan it is fuzzy like a peach with a h...
view the full question and answer
Plant Identification
October 20, 2009 - I have encountered a plant (two growing side by side) in our wooded back yard. It came up on its own, is about two feet tall, has leaves resembling that of an Angel's trumpet, about 4-5" long, jagge...
view the full question and answer
Plant ID from San Anselmo CA
June 12, 2012 - I have a spreading ground cover that no one has been able to ID in years of searching. I have taken photos of flower and foliage.
I want to ID to try to improve site conditions and increase covera...
view the full question and answer
Plant identfication
April 06, 2009 - slow growing woody vine, yellow flowers, (grows butterfly shape leaves with seed in middle of it) in addition to the regular leaves.
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |