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

53. Cyperus squarrosus Linnaeus, Cent. Pl. 2: 6. 1756.

具芒鳞砖子苗 ju mang lin zhuan zi miao

Cyperus aristatus Rottbøll, nom. illeg. superfl.; Mariscus aristatus Chermezon (1938), nom. illeg. superfl., not (Bentham) Kuntze (1891); M. squarrosus (Linnaeus) C. B. Clarke; Scirpus intricatus Linnaeus.

Annuals. Roots fibrous. Culms densely tufted, 2-10 cm tall, compressed triquetrous, smooth, leaved at basal part. Leaves longer to slightly shorter than culm; sheath purplish brown; leaf blade ca. 2 mm wide, flat, smooth. Involucral bracts 3-5, leaflike, longer than inflorescence, obliquely spreading. Inflorescence a simple anthela; rays 2-5(-7), to 2.5 cm. Spikes ovoid to oblong-ovoid, 1-1.5 cm × 6-8 mm, with many spikelets. Spikelets densely arranged, linear-oblong to oblong, 4-5 × ca. 1.5 mm (excluding length of arista), slightly compressed, divergent, 8-10-flowered; rachilla wingless, caducous. Glumes reddish brown to brown, lax, ovate-oblong, ca. 2.5 mm (including length of awn), membranous, deciduous at maturity, 7-veined, keel abaxially conspicuous, apex with a 0.5-1(-1.3) mm arista. Stamen 1; anther ellipsoid, 0.2-0.3 mm. Style 0.3-0.5 mm; stigmas 3, 0.4-0.7 mm. Nutlet dark grayish brown, obovoid-oblong, 0.7-0.8(-1.1) mm, 3-sided, with punctate processes, apex truncate and apiculate. Fl. and fr. Sep-Oct. 2n = 98.

Grasslands in forests, wet places at river margins, mountain slopes, wet sandy areas, along trails and roadsides, field margins; 1200-4000 m. Sichuan, E and S Xizang, Yunnan [Afghanistan, Bangladesh, Bhutan, India, Indonesia, Kashmir, Myanmar, Pakistan, Sri Lanka, Thailand, Vietnam; Africa, SW Asia (Arabian Peninsula), Australia, Central, North, and South America, Europe, Madagascar].


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