Hemigymnia arnottiana Stapf var. micrantha Balansa ex A. Camus in Lecomte, Fl. Indo-Chine 7: 455. 1922.

Spikelets 2–2.5 mm; upper glume ovate, ca. 1/2 spikelet length, 7-veined; lower lemma 5–7-veined. Fl. and fr. Jul–Nov.

The name "Panicum nodosum var. micranthum Balansa" (J. Bot. (Morot) 4: 142. 1890) is a nomen nudum and was therefore not validly published. The combination Ottochloa nodosa var. micrantha was not previously validly published by P. C. Keng (Iconogr. Cormophyt. Sin. 5: 160. 1976) because no reference to the basionym was provided.

Valleys, moist forest margins. Guangdong, Hainan [Vietnam].