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Taiwan Gramineae | Family List | Poaceae | Microstegium

Microstegium vimineum (Trin.) A. Camus, Ann. Soc. L. Lyon n. s. 68: 201. 1921. Hsu, Fl. Taiwan 5: 676. 1978; Koyama, Grass. Jap. Neighb. Reg. 427. 1987.

柔枝莠竹

Microstegium vimineum
leaf cs section

Credit: cs kuoh

Andropogon vimineus Trin., Mem. Acad. St. Petersb. VI. Math, Phys. Nat. 2: 268. 1832.
Microstegium vimmeum var. polystachum (Fr. & Sav.) Ohwi, Act. Phytotax. Geobot 11: 156. 1942.
Microstegium vimineum var. imberbe (Nees) Honda, Monogr., 408. 1930.

Culm geniculate at the basal node, about 1 mm thick. Blade about 4.5 cm long by 6-7 mm wide, tomentose, especially on the back; ligule 0.3-0.4 mm long, hispid on the back. Racemes 1-3, subdigitately arranged, about 5 cm long. Spikelets paired, monomorphic, the upper pedicellate, the lower sessile, about 4.5 mm long; rachis-joint shorter than the spikelet. Lower glume chartaceous, lanceolate, as long as the spikelet, 2-keeled, scabrous on keels, margins fimbriate, nerves anastomosing; upper glume deltoid;lanceolate, 1-keeled, pointed, margins membranous, inrolled and fimbriate; lower lemma hyaline; lanceolate or linear, acute or 2-cleft, about 3 mm long; upper lemma deltoid, chartaceous, about 1 mm long with an awn of about 4 mm long, arising from the apex; upper palea lanceolate-deltoid, about 1.2 mm long, chartaceous. Caryopsis about 3.5 mm long; embryo 1/2 the length of the caryopsis. . Distributed from Northeastern India to South-eastern Asia, China and Japan.

TAIPEI: Kuangyingshan, Hsu 1126*. Shimen, Hsu 1254. ILAN: Yuenyanghu, Hsu 14552. TAOYUAN: Neili, Hsu 1235. MIAOLI: Senghsin, Hsu 1366. NANTOU: Sun Moon Lake, Hsu 1329. CHIAYI: Fengchihu, Kao 4944. TAINAN: Hsinhuatien, Hsu 185.

This is a common grass growing along ditches on hillsides.

midrib 中肋: (la)large:several vascular bundles

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (mistr)strand variable with size of vein

chlorenchyma 葉綠組織: (inrad)somewhat radiate and equal or
slightly large
than bundle sheath cell in width, distinctive cells presented 特異細胞

bundle sheath 維管束鞘: (sk)single bundle sheath with
conspicuous chloroplast

buliform cells not well developed 泡狀細胞不發達: (nobul)if present only along side of midrib

chlorenchyma cell number between two adjacent veins: 2-3

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (per)large amount and in peripheral site

mestome sheath 內束鞘細胞: (Xyms -)metaxylem pole adjacent with
outer bundle sheath

chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed

Goggle image search: Link

Vascular Plant Type Catalog at NYBG: Link


 

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