S: (n) corolla ((botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth) "we cultivate the flower for its corolla"
S: (n) 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)
S: (n) hair (a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss) "he combed his hair"; "each hair consists of layers of dead keratinized cells"