Stenotaphrum helferi Munro ex Hook. fil.

Perennial. Culms stoloniferous, flowering shoots 10–40 cm tall. Leaf sheaths loose, laterally compressed, keeled, glabrous; leaf blades broadly linear, 5–17 × 0.5–1.1 cm, glabrous, base truncate, apex abruptly acute; ligule ca. 0.3 mm. Inflorescence 10–15 cm; axis with foliaceous wing, 3–5 mm wide, midrib sharply triquetrous with scabrous margins; racemes 7–18 mm, appressed within the curves of the midrib, bearing 3–7 spikelets, lowest racemes free; raceme rachis triquetrous, margins spinulose. Spikelets ovate-lanceolate, dorsally flattened, 4–4.5 mm, strongly veined, acuminate; glumes herbaceous, acute; lower glume broadly ovate, 1/2–2/3 as long as spikelet, (3–)5–7-veined; upper glume as long as spikelet, 9–11-veined; lower floret staminate or neuter, lemma firmly herbaceous, 7-veined, palea well developed; upper lemma coriaceous, smooth, cuspidate-mucronate, tardily deciduous. Fl. and fr. autumn.

Fujian, Guangdong, Hainan, Yunnan [Malaysia, Myanmar, Thailand, Vietnam].

Moist lawns, forest edges, open forests; below 1100 m.

Stenotaphrum helferi là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Munro ex Hook.f. miêu tả khoa học đầu tiên năm 1896.

钝叶草（学名：Stenotaphrum helferi）为禾本科钝叶草属下的一个种。