| Prior to the aestivation of the calyx, pairs of stamen primordia are initiated. |
| Their perigonium consists of two trimerous whorls of tepals, or conversely of a perianth comprising calyx and corolla. |
| The calyx, the subtending bracts and the two prophylls bear groups of extrafloral nectaries. |
| As plants reached flowering maturity, the gender was noted and flower measurements were taken on petal limb, petal claw and calyx diameter. |
| In unstalked crinoids, the cirri are located on the end of the calyx opposite the mouth, and are used by the animal to grasp the substratum. |
| The outer surface of two parts yield numerous mamillate protrusions, which are larger and sparser on the calyx than those on the stalk. |
