猪毛草 zhu mao cao

Scirpus wallichii Nees in Wight, Contr. Bot. India, 112. 1834; Schoenoplectiella wallichii (Nees) Lye; Scirpus erectus Poiret var. wallichii (Nees) Beetle; S. sasakii Hayata.

Plants without a distinct rhizome. Culms tufted, 10-40 cm tall, smooth, clothed at base with 2-4 leaf sheaths. Leaf sheaths 2-10 cm, with basal ones straw-colored and apical ones pale green, mouth obliquely truncate and with a subulate ca. 0.8 mm appendage. Involucral bract 1, erect, culmlike, 4.5-16 cm, base dilated, apex acute. Inflorescence a pseudolateral head, with 1-3 spikelets. Spikelets pale green to pale brownish green, narrowly ovoid to oblong-ovoid, 7-20 × 3-6 mm, densely many flowered, apex acute. Glumes oblong-ovate, 4-5.5 × ca. 2.5 mm, thinly leathery, apex acuminate with a green costa excurrent into a mucro. Perianth bristles 4(or 5), longer than nutlet, retrorsely scabrous except at base. Stamens 3; anthers oblong; connective apex slightly evident beyond anthers. Style 2-2.5 mm; stigmas 2. Nutlet blackish brown, broadly ellipsoid, ca. 2.5 mm, plano-convex, ± transversely wrinkled, shiny. Fl. and fr. Aug-Nov.

Wet places, stream margins, river margins, paddy fields; 800-1300 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Taiwan, Yunnan, Zhejiang [NE India, Japan, Korea, Malaysia, Myanmar, Philippines, Vietnam].