Calyx. Perianthium quinquefidum, acutum, parvum, persistens.
Corolla. Monopetala, crassa, quinquefida, acuta, contorta.
Nectaria duplicia, stelliformia; superiore genitalia tegente.
Stamina sub-sessilia, ad nectarium adhærentia. Antheræ bifidæ.
Pistilla. Germina duo, oblonga, acuminata. Styli duo, subulati. Stigma utroque commune, magnum, crassum, pentagonum.
Pericarpium. Folliculi duo, uniloculares, univalves.
Semina numerosa, pappo coronata.
Empalement. Cup five-cleft, sharp, small, and remaining.
Blossom one-petalled, thick, five-parted, pointed, and twisted.
Honey-cups double and starlike; the upper nectary hiding the parts of fructification.