What is "sulfur butterfly"

n. the cloudless sulfur

n. any of numerous yellow or orange butterflies [syn: sulphur butterfly]

Several taxa of butterflies are collectively called the Sulfurs or '' Sulphurs:

• Coliadinae, a subfamily of butterflies commonly known as the Sulfurs or Yellows
• Dercas, a genus of Coliadinae commonly called the Sulfurs
• Colias, a genus of Coliadinae commonly called the Sulfurs (in North America) or Clouded Yellows (elsewhere)
• Phoebis, a genus of Coliadinae that is not itself called the Sulfurs but that contains a number of species which are