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 bald cypress cones toxic to dogs? October 27, 2013 - Are bald cypress tree seed pods poisonous? to dogs? We just got a rescue dog and we go out in the yard with her. But now that we are into fall and the pods are falling. She goes right to them. Are... view the full question and answer
Are black walnut and sugar maple poisonous to alpacas June 09, 2008 - I have alpacas and wonder if black walnut or sugar maple are poisonous to them. view the full question and answer
Thorn in the hand in Benton KY June 14, 2010 - My husband got stuck by a thorn on a thorn bush and the thorn was a goldish copper color. There is a knot on his hand and pain in his fingers to his elbow. Do you know what kind of bush this could b... view the full question and answer