Fls regular, wingless; perianth-lobes equal or the inner the larger, the throat partly closed by an annulus; stamens 6, pendent from the annulus within the tube; fr fleshy, crowned by the perianth-tube; fleshy, achlorophyllous herbs, mostly small, with a few minute cauline lvs and 1-few fls. 25, mainly trop.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.