Description from Flora of China
Schizostachyum subvexorum Q. H. Dai & D. Y. Huang.
Culms erect, to 12 m, 4–10 cm in diam., apically suberect; internodes terete, straight, to 67 cm, scabrous, white powdery, initially often strigose; wall ca. 3 mm. Branches 50–70 cm. Culm sheaths tardily deciduous, straw-colored, white powdery, with stiff, pale yellow hairs, margins glabrous, apex truncate or slightly concave; auricles inconspicuous; oral setae many, ca. 5 mm; ligule truncate, short, 1–2 mm, glabrous, margin lobed, with fimbriae 3–5 mm; blade reflexed, linear-lanceolate, less than 1/2 length of sheath, abaxially glabrous, apex acuminate. Leaves 6–9 per ultimate branch; sheaths often white powdery; auricles inconspicuous; oral setae numerous, 5–6 mm; blade oblong-lanceolate or ovate-lanceolate, 20–30 × 2.5–4 cm. Pseudospikelets terete, ca. 3 cm, white villous; prophylls oblong-obovate, 5–7 mm, papery, apex obtuse, keels 2, ciliate; bracts 1 to several, oblong, 6–15 mm, papery, many veined, apex obtuse to acute and mucronate; florets 1 or 2, terminal floret usually fertile; rachilla disarticulating. Glumes absent; lemma oblong-lanceolate, 1.5–1.7 cm, densely white-villous, strongly involute, many veined, apex scabrous, acute, mucronate, mucro ca. 2 mm. Palea to 2.6 cm, base spirally involute, papery, distally obviously grooved, nearly glabrous, white ciliate, many veined, apex bifid (fertile spikelets) or unequally 2-keeled (sterile spikelets); lodicules absent. Filaments to 1.8 cm, bases usually connate in pairs; anthers yellow-brown, to 1.2 cm. Ovary glabrous, shortly stalked; style pale yellow; stigmas 3, purple, plumose. Fruit unknown. New shoots Jul–Aug.
The culms are used for making paper pulp and are split for weaving. The species is also grown as an ornamental.
* Hills, forests, cultivated near villages. Guangdong, Guangxi, Yunnan.