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

Tuesday - August 27, 2013

From: Ellicott City, MD
Region: Mid-Atlantic
Topic: Plant Identification, Poisonous Plants
Title: Identity of plant with thorns in Maryland
Answered by: Nan Hampton

QUESTION:

I live in Maryland and was walking in the woods one day when I accidentally stumbled in to a thorn bush. I don't remember what color the thorns where or very much about the plant in general but I do know it hurt more than a normal thorn bush, and it kept hurting. It felt like it had an irritant on the thorns that made the cuts from it swell red, itchy, and painful. That went away after awhile but today I found two, large red dots on the side of my foot that had seemed to get bigger and more painful. I checked all insects and arachnids in the area but found none that could have caused it. Could it be the thorns? If so, do you know what kind of thorns they are? Thanks Mr. Smarty Plants.

ANSWER:

We have had questions before about plants with poisonous thorns.  So far as I know there are no plants in North America with thorns that are poisonous or have an irritating substance associated with them.   I am going to refer you to the most recent of those questions which also has references to earlier questions.  You haven't given us enough information to identify what plant the thorns you encountered were on.  There are plenty of plants with thorns in Maryland—Smilax bona-nox (Saw greenbrier), Rosa carolina (Carolina rose), Aralia spinosa (Devil's walkingstick), and Rubus allegheniensis (Allegheny blackberry) to name just a few—but without a description of the plant I can't even begin to identify the source of the thorns.

There are at least two possible explanations for the initial red, itchy, painful results of your encounter with the thorny plants and the subsequent red spots on your foot:

  • Dirt or other sources of bacteria were on the thorns and were transferred to you when the thorns pierced your foot and this caused the irritation and possibly an infection.
  • The tips of the thorns were broken off in your skin and are still there causing the irritation.

Either way, if your foot is still sore and painful, you should see a doctor to treat the problem.

 

More Plant Identification Questions

Idendification of plants with white cotton ball flowers
July 03, 2012 - A few months ago I found a small plant with a white cotton ball type flower on it. It had red spots. It was on the bank of the Nashua river. I had never seen this before, and I am having a hard time ...
view the full question and answer

Plant identification
September 23, 2010 - There is a vine that grows at my child's daycare that has been taunting me day and night, because I have no idea what it is and I typically have no problems identifying plants. Description: Vine- L...
view the full question and answer

Learning to identify native plants in backyard
June 28, 2011 - Please let me know how a layman like myself can identify native plants in my backyard. I don't know the plant names and don't know if they are dicots or any other technical terms (that some websites...
view the full question and answer

Identification of a flower with grape kool aid fragrance
May 17, 2007 - While I lived in Texas someone gave me a flower from a "tree" (i am not sure tree is the right word). It was a large white flower that closed up in the evenings and smelled sweet like grape kool ai...
view the full question and answer

Identity of plant that resembles rosemary in Georgia
August 13, 2012 - Hi, I am an herbalist, but have been unable to identify this plant and it's driving me nuts since I cannot find any information on it. I live in NE Ga and have a plant that grows here that looks li...
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