Calyx. Perianthium quinquepartitum, acutum, persistens; laciniis oblongis.
Corolla. Petalum unicum, inferne tubulatum, imperforatum, superne quinquefidum, planum, marcescens; figura varia.
Stamina. Filamenta quinque, subulata, corolla breviora. Antheræ simplices.
Pistilla. Germen oblongum, cylindraceum, longitudine staminum. Styli nulli. Stigmata duo, ovata.
Pericarpium. Capsula oblonga, teres acuminata, apice leviter bifida, unilocularis, bivalvis.
Semina numerosa, parva. Receptacula duo, singula valvulæ longitudinaliter adnatæ.
Empalement. Cup five divisions, sharp and permanent; segments oblong.
Blossom. Petal only one, lower part tubular, and close; upper part five-cleft, flat, withering, and variously shaped.
Chives. Five threads, awl-shaped, shorter than the blossom. Tips simple.
Pointals. Seed-bud oblong, cylindrical, as long as the chives. Shafts none. Summits two, egg-shaped.