pappus: calyx composed of scales or bristles or featherlike hairs in plants of the Compositae such as thistles and dandelions
calyx: (botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green
streptococcal sore throat: an infection of the oral pharynx and tonsils by streptococcus