Calyx. Perianthium pentaphyllum persistens; foliolis lanceolatis, erectis, acutis, apicibus reflexis.
Corolla monopetala, infundibuliformis, tubus cylindricus, longitudine calycis, ore villis clauso; limbus semiquinquesidus, laciniis concavis, acutis.
Stamina. Filamenta quinque, tubo supra medium inserta. Antheræ erectæ, sagittatæ, intra faucem.
Pistillum. Germen ovatum. Stylus filiformis, apice parum curvatus, longitudine tubi, persistens. Stigma concavum.
Pericarpium. Bacca ovata, compressa, calyci accreta.
Semen. Nux quadrilocularis, putamine durissimo; nuclei oblongi.
Empalement. Cup five-leaved, permanent; leaflets lance-shaped, upright, pointed, and reflexed at the ends.
Blossom one petal, funnel-shaped, tube cylindrical, the length of the cup, the mouth closed with soft hairs; border half five-cleft; segments concave and pointed.
Chives. Threads five, inserted into the tube above the middle. Tips upright, arrow-shaped, within the mouth.
Pointal. Seed-bud egg-shaped. Shaft thread-shaped, a little curved at the end, the length of the tube, remaining. Summit concave.