I have around 7-8 Catalpa (Indian Bean Trees) in the yard but they don't seem to bloom every year, they take turns. They get pods about a foot long that are full of seeds, and although the roots are poisonous, the bark and leaves have many medicinal properties.
A tea can be brewed from the bark that can be used as an antitoxin for snake bites. It is also effective as a natural antiseptic, a laxative, sedative and vermifuge (I had to look that one up- it kills intestinal parasites such as tapeworms). It can also used as a substitute for quinine to treat malaria- I'll try it the next flare-up I get.
The leaves can be ground into a poultice to treat wounds and abrasions.