The caterpillar varies often. It's varies from green to blackish-green. It may have markings or may not have markings. Marked individuals normally have stripes on the top and sides of their bodies. It is the only caterpillar to feed on "Guaiacum sanctum". The chrysalis is a bluish-green color. The Lyside Sulphur can grow from egg to adult in as little as 13 days. It has 3 or more broods per year in southern Texas.