Corolla monopetala, campanulata; limbus sexfidus, reflexus.
Nectarium; pori tres melliferi ad apicem germinis.
Stamina. Filamenta sex, subulata, breviora. Antheræ conniventes.
Pistillum. Germen superum, rotundo-trigonum, trisulcum. Stylus simplex, corolla brevior. Stigma obtusum.
Pericarpium. Capsula subrotunda, triquetra, trilocularis, trivalvis.
Semina bina (sæpius,) subrotunda.
Empalement none.
Blossom one petal, bell-shaped; border six-cleft, reflexed.
Honey-cup, three honied pores at the tip of the seed-bud.
Chives. Six threads awl-shaped, shorter. Tips converging.