Ovary uniovulate, somewhat compressed, delicate below; style slender, stigma solitary and capitate.
Capsule scarcely compressed, the very delicate base more or less immersed in the indurate base of the partial inflorescence, the apex in the one species known in ripe fruit with a firm to rather narrow, raised apical rim; seed with copious endosperm.
Perianth segments 5, narrow, 3-nerved, mucronate, hyaline-margined.
Stamens 5; filaments filiform, delicate, fused below with the interposed flabellate pseudostaminodes; anthers narrow, bilocular.
Leaves entire, opposite on simple or branched stems.
Partial inflorescences consisting of two solitary fertile flowers accompanied by one or two lateral bracteolate triads of a central fertile flower subtended by two lateral bracteolate sterile flowers; sterile flowers consisting of long, narrowly bracteoliform, plumose-pilose processes, some short scale-like processes (probably reduced perianths) frequently also present at fruit-fall; partial inflorescences (in the one species in which ripe fruit is known) very indurate at the base in fruit, falling as a burr-like unit complete with bracteoles.
Bracts persistent on the inflorescence axis.