Enteropogon dolichostachyus (Lag.) Keng

Locally this species is found only in southern Taiwan.

Enteropogon has traditionally been separated from Chloris on the basis of inflorescence form. Enteropogon has a single raceme, whereas Chloris has several digitate racemes. Thus this species has frequently been placed in Chloris. However, this inflorescence character is unreliable for separating the two genera, and a better separation is achieved on the basis of lemma and caryopsis compression, in which case this species falls within Enteropogon.

Culm tufted, up to 2 m tall. Blade linear, 30 cm long or more, 0.5-1 rnm s wide, midrib white, conspicuous, surface loosely glandular hairy; ligule about 0.5 mm long, fimbriate; sheath-margins hairy. Inflorescence digitately arranged spikes, these about 15 cm long. Spikelets 2-flowered, about 5 mm long; glumes chartaceous, deltoid-lanceolate, acute and aristate, conspicuously 1-nerved; the lower glume 1/2 as long as the upper; lemma purplish, subcoriaceous, siliceous, broadly lanceolate, about 5 mm long, margins inrolled, 3-nerved, 2-toothed, midrib protruding into an awn, nearly as long as the lemma; palea linear, 2-keeled, upper margin siliceous, with the same texture and length as the lemma; upper floret reduced into a sterile lemma. Caryopsis about 3.5 mm long; embryo 1/2 the length of the caryopsis.

Perennial. Culms erect or geniculately ascending, sometimes rooting at lower nodes, (0.5–)1–1.5(–2) m tall. Leaf sheaths glabrous or tuberculate-hispid, especially on margin, pilose at mouth; leaf blades linear, flat or rolled, 15–45 cm, 4–15 mm wide, scabrous, often tuberculate-hispid near ligule, apex setaceous; ligule ca. 0.4 mm. Racemes digitate, 3–10, ascending at first, later divaricate or drooping, 10–20 cm; rachis triquetrous, scabrous. Spikelets with 2 florets, 5–7 mm; lower glume linear-lanceolate, 2–3 mm; upper glume lanceolate, 3–5 mm, awn-pointed; lemma of fertile floret oblong-lanceolate, 3.5–5 mm, glabrous, scabrous along either side of midvein and toward apex; awn 8–16 mm; palea linear-lanceolate, narrower than lemma, keels scabrous; upper floret reduced to an oblong 0.8–1.8 mm lemma with 2–5 mm awn, appressed to fertile floret. Fl. and fr. Mar–Nov.

Distributed from Afghanistan through India to South-east Asia and South China.

Guangdong, Guangxi, Hainan, S Taiwan, S Yunnan [Afghanistan, Bhutan, India, Indonesia, Malaysia, Myanmar, Nepal, New Guinea, Pakistan, Philippines, Sri Lanka, Thailand; N and NE Australia].

River valleys, fields, banks, roadsides, and thicket on hills; 200–1000 m.

Chloris dolichostachya Lagasca, Gen. et Sp. Pl. 5. 1816.
Chloris incompleta Roth, Nov. Pl. Sp. 60. 1821; Honda, Monogr. Poac. lap. 156. 1930.

Chloris dolichostachya Lagasca, Gen. Sp. Pl. 5. 1816.

Enteropogon dolichostachyus là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (Lag.) Keng mô tả khoa học đầu tiên năm 1957.

腸鬚草（学名：Enteropogon dolichostachyus）为禾本科腸鬚草屬下的一个种。