I wish I paid more attention over the years when I was locating trees. Our tree guy marked exactly what they were, and I typed it into the collector while standing under them. It didn't matter much to me then though. I just wanted to get it done.
Pick your Catalpa species (courtesy of Wikipedia):
The two North American species, Catalpa bignonioides (southern catalpa) and Catalpa speciosa (northern catalpa), have been widely planted outside their natural ranges as ornamental trees for their showy flowers and attractive shape. Northern and southern catalpas are very similar in appearance, but the northern species has slightly larger leaves, flowers, and bean pods. Flowering starts after 275 growing degree days. Catalpa ovata from China, with pale yellow flowers, is also planted outside its natural range for ornamental purposes. This allowed C. bignonioides and C. ovata to hybridize, with the resultant Catalpa × erubescens also becoming a cultivated ornamental.
List of selected species Sources: (GRIN accepts 8 species)(KEW accepts 8 species)
Re the bark, it doesn't look like the bark of butternuts I'm used to nor did it match the bark photos online except for one photo that did show a good likeness. The tree is unfortunately to be removed but I'll take a closer look as I work on it.
2) Found this cool wood ID website. There are leaf ID sites, bark ID sites, but this is the first wood ID site I've seen.