Achyropsis Benth. & Hook.F.

Annual or perennial herbs or low shrubs with entire opposite leaves which may be solitary or in fascicles. Inflorescence terminal on the stem and branches, subcapitate to spiciform, bracteate. Flowers solitary in the axils of the bracts, all hermaphrodite, bibracteolate, small, modified sterile flowers absent. Bracts persistent, finally weakly deflexed or deflexed-ascending; bracteoles and perianth falling with the fruit; bracteoles closely appressed to the perianth. Perianth-segments 4–5, glabrous, firm, deeply concave and usually ± hooded at the apex, 1(–3)-nerved with the midrib ceasing below the muticous apex or occasionally excurrent in a minute mucro. Stamens 4–5; filaments delicate, shortly monadelphous at the base, alternating with narrowly triangular to quadrate or oblong pseudostaminodes with or without a dorsal scale; anthers bilocular. Ovary with a single pendulous ovule, glabrous; style very short to slender; stigma capitate. Fruit a thin-walled capsule, irregularly ruptured by the developing seed. Seed globose or slightly compressed; endosperm copious.