Muhlenbergia huegelii Trin.

This species is locally found in mountainous regions along shaded streams.

Distinguished from Muhlenbergia duthieana by its loose panicle and very short glumes. It is a taller, more robust species than either Muhlenbergia duthieana or Muhlenbergia himalayensis and differs from the latter also by its broader leaves, shorter glumes and, in most cases, absence of stolons. 1600-3000 m.

Culm erect, with stolon. Blade linear, 9-10 cm long by 3 mm wide; ligule chartaceous, about 2.4 mm long, truncate, upper part minutely ciliate. Inflorescence a contracted panicle, about 13 cm long. Spikelets 1-flowered, about 2 mm long; glumes chartaceous, nerveless; the lower glumes about 2.6 mm long, lanceolate, irregular-ciliated at apex; the upper glume about 0.8 mm long, ovate-lanceolate; lemma about 2 mm long, chartaceous, lanceolate, basal margin bearded, : 3-nerved, tipped with a long awn of about 8 mm long; palea chartaceous, lanceolate-keeled, as long as the lemma, basal part bearded.

Rhizomatous perennial; culms 30-115 cm high, ascending from a decumbent base, only rarely rooting from the lower nodes. Leaf-blades 7-26 cm long, 2-7 mm wide, scabrid; ligule c. 1 mm long, obtuse. Panicle 1040 cm long, nodding, loose, the spikelets not or only slightly clustered on the rather long flexuous primary branches. Spikelets 2-3.3 mm long; glumes subequal, 13-2.2 mm long, elliptic, acute or obtuse, the lower usually a little shorter than the upper and sometimes nerveless, rarely the upper also nerveless; lemma as long as the spikelet, hairy in the lower part, minutely notched at the tip and bearing a fine awn 8-20 mm long.

Plants usually with long, scaly rhizomes. Culms erect, 70–90 cm tall, rigid, puberulent below nodes. Leaf sheaths loose, glabrous, usually shorter than internodes; leaf blades 4–14 × 0.4–1 cm, flat, scabrid on both surfaces and margins, apex acuminate; ligule ca. 1 mm, glabrous or ciliate. Panicle 8–27 cm, rather open, sometimes nodding; branches few to many at each node, branches and pedicels all slender, scabrid. Spikelets lanceolate, 2–3 mm, gray-green or purplish; glumes 0.5–1.2 mm with lower glume slightly shorter than the upper, hyaline, veinless or upper glume 1-veined, apex obtuse; lemma 2–3 mm, gray-green or purple, scaberulous, lower 1/4 of back pilose; awn 8–16 mm. Anthers ca. 0.8 mm. Fl. and fr. Jul–Oct. 2n = 40, 42.

N. & N.E. India to China, Korea, Japan, Philippines.

Distributed in China, Korea, Manchuria and Japan.

Distribution: Pakistan (Punjab, N.W.F.P., Gilgit & Kashmir): Afghanistan; Himalayas.

Anhui, Fujian, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Afghanistan, Bhutan, India, Japan, Korea, Nepal, Pakistan, Philippines, Russia].

2100-2300 m

Fl. & Fr. Per.: July-August.

Moist places in mountain valleys, riversides, forests; 900–3000 m.

Muhlenbergia arisanensis Hayata; M. geniculata Nees ex Steudel; M. longistolon Ohwi; M. viridissima Nees ex Steudel.

Muhlenbergia longistolon Ohwi, Bull. Nat Sci Museum (Tokyo) 26:3. 1949; Hsu, Taiwnia 16: 264. 1971, Taiwan Grass. 437. pl. 114. 1975; Hsu, Fl. Taiwan 5: 498. 1978.
Muhlenbergia arisanensis Hayata, Icon. Pl. Form. 7: 87. 1918; Ohwi, Bot. Mag. Tokyo 55: 396. 1941.

Muhlenbergia huegelii là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Trin. mô tả khoa học đầu tiên năm 1845.

乱子草（学名：Muhlenbergia huegelii）为禾本科乱子草属下的一个种。