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
18 ratings

Sunday - July 27, 2008

From: Lake Francis, MB
Region: Canada
Topic: Poisonous Plants
Title: Plant with poisonous thorns
Answered by: Nan Hampton

QUESTION:

Is there a bush or tree out there that has thorns on it that can make you swell and cause you to feel like you can hardly move you're whole hand.

ANSWER:

I searched the Canadian Poisonous Plants Information System for such a plant in Manitoba. I found the following two plants with stinging hairs which might be considered very small thorns, but I could find nothing with large thorns that has the effect that you mention.

Laportea canadensis (Canada nettle) has stinging hairs that can cause pain and discomfort. Here are photos and more information.

Urtica dioica (stinging nettle) also has stinging hairs that give a painful sting, swelling, itching and numbness. More information and photos.

If you didn't actually see the thorn or thorns that caused this, you might consider that you were bitten by a spider or stung by some insect.


Urtica dioica

 

 

More Poisonous Plants Questions

Evergreen pet-safe shrubs for house and screening in McKinney TX
April 15, 2010 - Looking for shrub, preferably evergreen, to plant near the house that can handle wet ground and is pet (dog, cat, horse) safe. The area became boggy after we had an underground water leak that is now ...
view the full question and answer

Is non-native cotoneaster poisonous to goats from Eureka CA
August 19, 2011 - I have heard that cotoneaster is poisonous to goats and other animals. We are trying to get rid of it in our yard, but I was hoping we could use goats to eat it back. What are our options in removin...
view the full question and answer

Ingestion of agave sap from Albuquerque NM
June 11, 2013 - My boyfriend was out in the Arizona desert without water for two days and sought moisture through what he thought was a yucca plant but instead we believe was agave. He sucked the moisture off the ins...
view the full question and answer

Identification of bush/vine with purple berries
August 09, 2014 - I was clearing fence line and came across this plant it looks like a Bush but underneath grows like a vine it has long broad leaves that reminded me of Polk salad but it grows berry clusters the berri...
view the full question and answer

Do palm trees put off a toxic smoke when burnt?
December 09, 2008 - do palm trees put off a toxic smoke when burnt
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