These pics are relatively non-descript, but any idea what this tree or shrub is?
Here is a link that might be useful:
Hmm, Catalpa normally has very broad leaves..
But do they ever appear narrow, maybe when young?
Here is a link that might be useful: Catalpa bignonioides - Southern Catalpa
Looks like catalpa w/immature leaves....
Yep: Catalpa in early stages.
Otherwise maybe X Chitalpa.
Hmm, the leaves do seem to resemble X Chitalpa more than Catalpa...?
"ÃÂ Chitalpa tashkentensis is a bizarre hybrid between two unlikely parents, the Catalpa bignonioides, the cigar tree, and Chilopsis linearis, the desert willow. The result is a great, relatively drought tolerant small tree that flowers from mid summer until early autumn."