En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Tuesday - September 02, 2008

From: San Antonio, TX
Region: Southwest
Topic: Poisonous Plants
Title: Curing plant rash
Answered by: Joe Marcus

QUESTION:

I went walking in the woods a few weeks ago, and my leg swiped some kind of cactus or something. It scratched me up and I had to remove little white spines with tweezers. I developed an intensely itchy rash that three weeks later is just as bad as when it first happened. It is not poison ivy or anything.. I have no idea what it is and it is not getting any better. I tried using Tea Tree oil and Shea oil.. it helps a little but has not cured the problem. I don't want to take any pharmaceutical drugs. Do you know how I can resolve this naturally?

ANSWER:

We don't think we can answer your question since giving medical advice is not really in our province, but it seems that after three weeks you might want to consult with a medical doctor.  However, we may be able to help you identify the cause.  If the offending plant was a cactus, it was likely Cylindropuntia leptocaulis (Christmas cactus), also known as Pencil cactus or Tasajillo.  Other possible offenders include Urtica chamaedryoides (heartleaf nettle), Cnidoscolus texanus (Texas bullnettle), and Tragia spp, (Noseburn). A less likely candidate (because it's not native to that area but occurs not too far away) is Cevallia sinuata (stinging serpent),  Finally, any number of insects with stining hairs, including saddleback caterpillars and stinging asps may have assaulted you.

 

From the Image Gallery


Texas bullnettle
Cnidoscolus texanus

Branched noseburn
Tragia ramosa

Stinging serpent
Cevallia sinuata

Tasajillo
Cylindropuntia leptocaulis

Betonyleaf noseburn
Tragia betonicifolia

More Poisonous Plants Questions

Problems with shrubs by pool in Bethesda, MD
February 24, 2012 - We are trying to grow Otto Luyken Laurels by a pool and doing okay, some brown spots on leaves, but not many. Also have Arbivatea beside the pool about 3 feet from the edge of the pool. They have a l...
view the full question and answer

North American Plants with Poisonous Thorns
December 01, 2011 - Are there any plants in North America that possess poisonous thorns?
view the full question and answer

Non-toxic plants for dog yard from Freeport PA
June 24, 2012 - I'm looking for wildlife-friendly native plants that aren't toxic to dogs. I have a place for some small shrubs and/or flowers. And a climbing vine that I could train on a trellis would work espec...
view the full question and answer

Poisonous weeds in Bedford County, PA
June 21, 2010 - I am battling my second bad round of poison in a month, this time on my face and in my left eye. It's awful. Problem is, I have looked and looked for poison ivy, oak and sumac around my neighborhoo...
view the full question and answer

Is Bignonia capreolata (crossvine) poisonous?
March 18, 2012 - I need to know whether any part of Crossvine (Bignonia capreolata) is poisonous. Am thinking of planting it at an Elder Day Center for people with memory problems and the director insists - no toxic ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center