Larval Host Plants:
The males are usually a bright yellow with orange barring along the wings edges. The females are usually much more orange like the worn one at right, which I also watched laying eggs. To watch these huge sulphurs in flight is really something to watch and yes they are noticeably larger than a Cloudless Sulphur in flight.
Start > Species List > Sulphurs > Orange-barred Sulphur
Mouse over the above image to see identification keys.