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
ram disk: (computer science) a virtual drive that is created by setting aside part of the random-access memory to use as if it were a group of sectors