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
Is non-native Ixora poisonous to horses? June 26, 2013 - My horse was eating an ixora bush at a park in south florida. Is the Ixora shrub poisonous to horses? view the full question and answer
Controlling Cnidoscolus texanus (Texas bullnettle) July 18, 2013 - Hello,I need your help to control some nasty weeds in my yard/pasture. I am an old timer and do not have a picture to include—haven't figured out that part of the camera/phone yet. This weed is a pri... view the full question and answer
Are berries from the Carrot Wood Tree toxic to animals? May 26, 2009 - Hello, I am trying to find out if the berries on the carrot wood tree are toxic to animals - dog? view the full question and answer