Northeastern Asian Flora
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Microstegium vimineum (Trin.) A.Camus  
Family: Poaceae
[Andropogon vimineus Trin., moreArthraxon nodosus Kom., Eulalia cantonensis (Rendle) Hitchc., Eulalia viminea (Trin.) Kuntze, Eulalia viminea var. polystachya (Franch. & Sav.) T.Koyama, Microstegium cantonense (Rendle) A.Camus, Microstegium dilatatum Koidz., Microstegium imberbe (Nees ex Steud.) Tzvelev, Microstegium japonicum subsp. somae (Hayata) T.Koyama, Microstegium japonicum var. boreale (Ohwi) Ohwi, Microstegium japonicum var. somae (Hayata) T.Koyama, Microstegium nodosum (Kom.) Tzvelev, Microstegium somae (Hayata) Ohwi, Microstegium vimineum f. polystachyum (Franch. & Sav.) T.Koyama, Microstegium vimineum f. willdenowianum (Nees) Osada, Microstegium vimineum subsp. nodosum (Kom.) Tzvelev, Microstegium vimineum var. imberbe (Nees ex Steud.) Honda, Microstegium vimineum var. polystachyum (Franch. & Sav.) Ohwi, Microstegium vimineum var. willdenowianum (Nees) A.Camus, Microstegium willdenowianum Nees, Pollinia cantonensis Rendle, Pollinia imberbis Nees ex Steud., Pollinia imberbis var. willdenowiana (Nees ex Lindl.) Hack., Pollinia viminea (Trin.) Merr., Pollinia willdenowiana (Nees ex Steud.) Benth., Polliniopsis somae Hayata]
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  • Japan Flora
  • Far Eastern Russia
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Japan Flora: Slender annual; culms 40-100 cm. long from a decumbent, branched, rooting base, glabrous; leaf-blades thin, flat, lanceolate, 4-10 cm. long, 8-15 mm. wide, short-acuminate, obliquely cuneate at base; ligules truncate, about 0.5 mm. long, puberulent on back; sheaths pubescent at least on outer margin above, d'orter than the leaf-blades and internodes of culms; inflorescence at length exserted; racemes 1-3, nearly erect to ascending, straight, green, 5-7 cm. long, the rachis joints rather thick, 3-angled, 3.5-5 mm. long, thickened above, short-pilose on the angles; pedicels about 2/3 as long as the spikelets; spikelets green, 4-8 mm. long, the pedicelled ones somewhat flattened laterally, the sessile ones with a shallow groove on the face between the 2 ciliate keels; awn long-exserted, to 15 mm. long;Sept.-Oct. Woods in lowlands and in low mountains.

Hok­kaido, Honshu, Shikoku, Kyushu; common. Korea, China, Ryukyus, Formosa, Malaysia, India, and the Caucasus.

Russia Flora: Plant 20—50 cm tall. Stems thin, geniculate, semi-prostrate or ascending, often branched at lower nodes, rooting. Sheaths glabrous, sometimes with hairs along margin; leaf blades 8—15 mm wide, lanceolate, petiolately narrowed toward base, scattered appressed-hairy beneath (and often above); ligule of upper leaves 0.5—1 mm long, long-ciliate. Inflorescence 2—8 cm long, of (1) 2—5 almost digitately arranged spike-like branches, breaking into segments 2.5—4 mm long at fruiting in upper part. Spikelets 5—6 mm long, arranged in pairs, with 2 flowers, where upper — bisexual and fertile, and lower — sterile. Glumes equal in length to spikelet, acuminate, with prominent veins (upper — keeled). Lower lemma (of fertile flower) bidentate at apex, with twisted thick awn up to 12 (18) mm long. Anthers (0.3) 0.5—1 (2) mm long. 2n=40 (Sokolovskaya, Probatova, 1977a). (Plate XXVI).

Ussuri (south). (Fig. 161). — On wet meadows, forest edges, along paths, sometimes as weed and along roads. VIII—X. — General distribution: Japanese-Chinese, introduced to other countries. — Described from Korean Peninsula.

Microstegium vimineum
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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