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FOC | Family List | FOC Vol. 23 | Cyperaceae | Blysmus

3. Blysmus sinocompressus Tang & F. T. Wang, Fl. Reipubl. Popularis Sin. 11: 224. 1961.

华扁穗草 hua bian sui cao

Rhizomes yellow, 2-7 cm × 2.5-3.5 mm, shiny, with black scales. Culms scattered, 5-60 cm tall, 0.7-4 mm thick, compressed 3-angled, clothed at base with brown to purplish brown leaf sheaths. Cauline leaves shorter than culm; ligule pale, very short; leaf blade flat, 0.5-4 mm wide, membranous, involute, margin scabrous, apex acuminate. Involucral bract leaflike, usually surpassing inflorescence; bractlets glumelike, membranous. Inflorescences consisting of 3-10 or more spikelets, densely arranged in a distichous or subdistichous spike; basal 1 or several spikelets usually remote, 1.5-3 × 0.6-1.1 cm. Spikelets narrowly ovoid, ovoid, or long ellipsoid, 5-7 mm, 2-9-flowered. Glumes rust-colored brown, subdistichous, long ovate, 3.5-4.5 mm, 3-5-veined, keel green, apex acute. Perianth bristles 3-6, flexuose or contorted, 2-3 × as long as nutlet, retrorsely scabrous. Stamens 3; anthers narrowly oblong, 2-2.5 mm; connective apex ca. 0.3 mm. Stigmas 2, ± as long as style. Nutlet dark brown, broadly obovoid, ca. 2 mm, plano-convex. Fl. and fr. Jun-Sep.

Wet places, stream and river margins, riverbeds, grasslands, valleys, swampy meadows, slopes; 500-4800 m. Gansu, Hebei, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan, Xinjiang, Xizang, NW Yunnan [Mongolia].

1 Culms 0.7-1 mm thick; leaf blade. 5-0.8 mm wide.   3c var. tenuifolius
+ Culms 1-4 mm thick; leaf blade 1.5-4 mm wide   (2)
2 (1) Culms 5-20 cm tall, 1-1.2 mm thick; leaf blade 1.5-2.5 mm wide.   3a var. sinocompressus
+ Culms 26-60 cm tall, 3-4 mm thick; leaf blade 3-4 mm wide.   3b var. nodosus

Lower Taxa


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