Catalpa, Northern, Catalpa speciosa Leaves for Wildlife Indian Bean Tree Gardening In Pearls Underfoot: THE CIGAR TREE Northcentral Pennsylvania Conservancy The Northern Catalpa Tree Nebraskaland Magazine While catalpa trees are not generally considered highly toxic, some parts of the tree, particularly the roots, are known to be poisonous according to the USDA Plants Database. The leaves and seed pods Northern Catalpa Catalpa Speciosa Deciduous Trees Cold Stream Farm