Paraknoxia Bremek.

Annual herbs. Leaves paired, shortly petiolate; stipules small, with several deltoid segments from a short base. Flowers small, hermaphrodite, dimorphic, some flowers with anthers included and style exserted and others completely vice versa, in small sessile terminal heads. Calyx-tube short; lobes small, 3–4, sometimes 1 enlarged and rest minute, or all minute. Corolla-tube narrowly funnel-shaped; lobes 3–4, oblong; throat hairy. Ovary 2-locular; ovules solitary in each locule, pendulous; style filiform; stigma bifid, the lobes filiform. Fruit ovoid, indehiscent, but longitudinally grooved and where the fruit breaks off a little cup is left being the persistent woody flanged pedicel; between this flange and the base of the fruit are masses of rhaphides. Seeds narrowly ellipsoid or ovate in outline, strongly compressed.