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

Thursday - September 12, 2013

From: Creston, BC
Region: Canada
Topic: Poisonous Plants, Vines
Title: Are seeds of trumpet vine poisonous from Creston BC
Answered by: Barbara Medford

QUESTION:

Are the seeds in the trumpet vines pods poisonous to humans or can I use them as dried beans? I have one plant that covers most of my house's south wall. It is a very established plant.

ANSWER:

For openers, this USDA Plant Profile Map does not show Campsis radicans (Trumpet creeper) growing in British Columbia at all, but only Manitoba in Canada. That doesn't mean it doesn't grow in British Columbia, it just hasn't been reported growing there. If you follow the plant link above to our webpage on the plant, you will see that no mention of poisonous seeds is given or, indeed, any poisonous part on the plant. However, this statement is included on that page: 

"Warning: The sap of this plant can cause skin irritation on contact."

So, we decided to search a little further as to the edibility of the beans (seeds) of this plant. We discovered that while the seeds grew in pods, Campsis radicans pods produced numerous, papery, and small seeds (696 seeds/pod) on average. So, it is not really a bean, per se, like members of the Fabiaceae family would produce. See the second and third pictures, below, from our Image Gallery, to see what the Trumpet Creeper seed pods and seeds actually look like. Except for the warning about the irritation of the sap, we could find no indication that the plant had any poisonous parts, but we don't think these seeds would produce a very tasty batch of beans like lima or pinto beans.

 

From the Image Gallery


Trumpet creeper
Campsis radicans

Trumpet creeper
Campsis radicans

Trumpet creeper
Campsis radicans

More Poisonous Plants Questions

Is Florida anisetree appropriate for school planting in New Orleans?
April 22, 2010 - Illicium floridanum, Florida anisetree We are considering using this plant for a landscape at a school. I have been informed that it is poisonous, but not by a reliable source. I am otherwise very...
view the full question and answer

Skin irritation caused by blanket flower (Gaillardia sp.)
January 29, 2005 - Could you tell me whether it is the leaves or the spent flower heads, the seed heads, that cause irritation to bare legs after walking through a field of Indian Blankets? Gallardia I believe is the La...
view the full question and answer

Does non-native Crown of Thorns cause cancer?
August 24, 2013 - Does the plant, Corona De Cristo (Crown of thorns) cause cancer?
view the full question and answer

Non Toxic Fruit Plants
April 03, 2015 - I am trying to plant on my backyard. My dog spends about 8 hours a day outdoors and I am afraid she will be poisoned. I am overwhelmed by the information of toxic trees\plants for dogs. However, I ju...
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

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