Calyx. Perianthium pentaphyllum erectum; foliolis lanceolatis, sub apice mucronatis, æqualibus, persistentibus.
Corolla. Petala quinque, obovata æqualia, flaccida, plicata, margine inequaliter dentata.
Stamina. Filamenta quindecim, erecta, connata in quinque corpora, e 3 singula. Antheræ oblongæ, versatiles.
Pistillum. Germen pentagonum, breve. Stylus columnaris. Stigmata quinque, recurva, oblonga.
Pericarpium nullum. Fructus rostratus, pentacoccus.
Semina solitaria, arillata; arista longissima demum spirali.
Empalement. Cup five-leaved upright; leaflets lance-shaped, pointed at the end, equal, and remaining.
Blossom. Five petals, inversely egg-shaped, equal, flaccid, plaited, unequally toothed at the margin.
Chives. Fifteen threads, upright, formed into five bodies, three to each. Tips oblong, versatile.
Pointal. Seed-bud five-sided, short. Shaft columnar. Five summits, recurved and oblong.