#sepal  one of the green parts that form the calyx of a flower
  supertype:  #floral_leaf  a modified leaf that is part of a flower
  part of:  #calyx
  subtype:  #calyx  the sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing a developing bud; usually green
     subtype:  #hull.calyx  persistent enlarged calyx at base of e.g. a strawberry or raspberry
     subtype:  #pappus  calyx composed of scales or bristles or featherlike hairs in plants of the Compositae such as thistles and dandelions
        subtype:  #thistledown  pappus of a thistle consisting of silky featherlike hairs attached to the seedlike fruit of a thistle

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