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Taiwan Gramineae | Family List | Poaceae | Microstegium

Microstegium nudum (Trin.) A. Camus, Ann. Soc. Linn. Lyon s. n. 68: 201. 1921. Hsu, Fl. Taiwan 5:675. 1978.


Microstegium nudum

Credit: cs kuoh, 2004 leaf anatomy

Pollinia nuda Trin., Mem. Acad. St. Petersb. VI. Math. 2: 307. 1823.
Eulalia nuda (Trin.) Kuntze, Rev. Gen. Pl. 2: 775. 1891.
Microstegium mayebaranum Honda, Monogr. 405. 1930.
Pollinia arisanensis Hayata, Icon. Pl. Formos. 7: 74. 1918.
Microstegium arisanense (Hayata) A. Camus, Ann. Soc. Linn. Lyon s. n..68: 201. 1921.

Culm tufted, erect or geniculate, about 1 mm across. Blade about 5 cm long by 4 mm wide, glabrous; leaf-base attenuate, petiole-like; sheath sometimes shortly hispid; ligule 0.5-0.7 mm long, chartaceous, rounded on the upper part, hairy on the back. Racemes 3-4, subdigitately arranged, about 4 mm long. Spikelets paired, monomorphic, the upper pedicellate, the lower sessile about 2.5 mm long; rachis-joint 1/2 the length of the sessile spikelet. Lower glume subcoriaceous,linear-lanceolate, 2-keeled, shortly ciliate along keels, furrowed on the back, as long as the spikelet; upper glume deltoid-lanceolate, l-keeled, keel ciliate, margins membranous, inrolled, minutely fimbriate; lower lemma, if present, lanceolate chartaceous, about 1.5 mm long; upper lemma linear, 1-nerved, with an awn arising from the tip, nearly as long as the lemma; upper palea chartaceous, about 0.5 mm long. Caryopsis about 1.5 mm long; embryo 1/3 the length of the caryopsis.

TAIPEI: Yangmingshan, Hsu 39; Kuanyingshan, Hsu 1140. NANTOU: Chitou, Hsu 3196. CHIAYI: Alishan, Sasaki s n. 1929. TAITUNG: Botel Tobago, Hsu 9931, 5005. HUALIEN: Luanshan, Hsu 3668.

Widely distributed in India, extending into Southeastern Asia to Japan.

A very common grass growing on the hills, often in light shade.

midrib 中肋: (sm)small:with one vascular bundle

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (boscl)(bostr)on both sides of veins as
strand or girder

chlorenchyma 葉綠組織: (inrad)somewhat radiate and equal or
slightly large
than bundle sheath cell in width

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

buliform cells well developed 泡狀細胞發達: mainly appear in adaxial side

no small vein under buliform cells泡狀細胞下無小脈: (fanfu)bulliform set fan shaped,
cells similar in size

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

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