Catalpia cordata.

Botanical name: 

CATALPIA CORDATA, J. Mx. (Bignonia catalpa, L.) Catalpa or Cataba tree. Near streams. Beautiful tree, with a soft white wood like Poplar. Bark tonic and vermifuge; wood emetic; leaves emollient, anodyne, useful in cataplasm in parturition and nervous pains. Blossoms smell like Martynia, give a bad honey to bees. Pods useful for asthma in decoction; when young may be pickled.

Medical Flora, or Manual of the Medical Botany of the United States of North America, Vol. 2, 1830, was written by C. S. Rafinesque.