"AlanG" wrote in message
. ..

Probably Catalpa speciosa...
http://tinyurl.com/2fxad9

Forgot the rest of this post...

1) Or C. bignonioides (don't know your location, but this is probably more
common)

2) Tree books with good photos would include National Audubon Society Field
Guide to North American Trees and Dirr's Hardy Trees & Shrubs.
If you don't mind black and white photos, a very good older book is Donald
Wyman's Trees for American Gardens.