Thamnea massoniana Dümmer

Usually 30-40 cm high, dense, with glabrous branchlets. Leaves mostly 3-4 mm long, broadly sessile, erect-spreading, slightly incurved above the middle, lanceolate, obtuse or truncate, with a small black apiculus, slightly convex above, convex and keeled beneath, scabridous on the keel and margins, glabrous. Flowers sessile, subtended by lanceolate involucral leaves. Calyx-tube clothed on the upper half with firm white appressed hairs: calyx-lobes about 7 mm long, imbricate at the lower margins, erect, oblong-lanceolate, subacute, rounded-convex and nervose on the dorsal surface, glabrous, red-brown. Petals about 1-6 cm long, consisting, in equal lengths, of a linear claw widening into an obovate very obtuse white lamina. Stamens reaching to the base of the lamina: filaments strap-shaped: anthers about 2.75 mm long, obtuse. Ovary bilocular, with 3-5 pendulous ovules in each chamber: stylar column slender, reaching to the base of the lamina: stigmas scarcely distinct. Fruit sessile, about 3 mm long, ellipsoid, depressed at the summit, with short appressed grey hairs in the sulcae.