Explore Plants

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
    
 

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
3 ratings

Thursday - September 23, 2004

From: Edmond, OK
Region: Southwest
Topic: Poisonous Plants
Title: Poisonous Trees
Answered by: Stephen Brueggerhoff

QUESTION:

Are redbuds and catalpa trees poisonous?

ANSWER:

The southern catalpa (Catalpa bignonioides) is commonly used in the southwest as a fast growing ornamental tree. However, the research that I have committed alludes to the vegetative parts of the catalpa as being poisonous. According to my research, many members of the pea family (Fabaceae) have been found to contain lectins, a carbohydrate-binding protein that may affect the intestines & prevent absorption of nutrients. Some members of the pea family are more toxic than others, depending on the species. Scooter Cheatham, in his book "The useful wild plants of Texas, the Southeastern and Southwestern United States, the Southern Plains, and Northern Mexico", states that the immature seed-pods of redbud (Cercis canadensis) can be eaten raw, cooked or boiled with no adverse effects. Conclusion: since I am not an accredited nutritionist, I can only provide you with a bit of information to supplement your research. I recommend contacting your state native plant society & determine if there is a local interest for ethnobotanical uses of your regional flora, which should lead you to credible resources that can supplement your research.
 

More Poisonous Plants Questions

Information about Rosa acicularis
March 07, 2008 - Hi: At your site under "Benefit" it is mentioned that the seeds, leaves bark and twigs of Rosa acicularis Lindl. can be fatally poisonous to humans and animals. None of my past or present studies h...
view the full question and answer

Are leaves of banana trees poisonous?
August 10, 2008 - are the leaves of banana trees poisonous? the tree will be in a preschool classroom How do i care for the tree?
view the full question and answer

Is the Magnolia 'Ann' safe for horses
May 14, 2010 - I bought a magnolia "ann". Will it hurt my horses to eat any part of it?
view the full question and answer

Skin irritation caused by hydrangea in Monroe GA
July 06, 2009 - Can Queen Anne Lace hydrangea cause a skin irritation such as poison ivy or oak? I picked up a branch that had broken off to discard and the following day I have a place on my arm about six inches lon...
view the full question and answer

Plants causing skin irritation in West Bend WI
May 26, 2011 - Is there a list of plants that cause blistering in this area? I have a friend who gets it bad every year-I find no evidence of cow parsnip or poison ivy---thanks.
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.