Description: 13-16 mm. This is the smallest pierid in the Keys and cannot likely be confused with any other species. Adults are yellow above with black forewing tips and a black bar on the base of the forewing. Females can have an orange colored hindwing and are a little larger. Ventral side is a dusty olive green color with forewing having an orange-yellow patch and some black spots. 

 

Habitat and Distribution: Common throughout Southern North America, Central America, South America, throught Florida and the Caribbean. It can be found in weedy fields and roadsides throughout the Florida Keys. 

 

Host Plant: Spanish needles (Bidens alba)

 

Natural History: This species can be found year around in the Keys and can be abundant but abundance is very sporadic