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Taiwan Gramineae | Family List | Poaceae | Alloteropsis

Alloteropsis semialata (R. Br.) Hitchc., Contr. U. S. Herb. 12: 210. 1909;. Hsu,Fl. Taiwan 5: 525. pl. 1420, 1978.

毛穎草

Alloteropsis semialata
Taiwan Grasses

Credit: CC Hsu

Panicum semialatum R. Br., Prodr. 192. 1810.

Perennials; culm densely tufted, rhizome present, erect, 30-60 cm tall, more or less pubescent below inflorescence, base thickly clothed with woolly remains of old sheath of leaf; ligule membranaceous, fringed, ca. 0.4 mm long. Blades linear, 10-30 cm long, 3-7 mm wide. Racemes mostly 2, sometimes 3 or 4, 3-13 cm long, subdigitately arranged; rachis slender, villous, 3-angled. Spikelets pedicellate, usually paired on one side, ovate-lanceolate, 5-7 mm long, pale or brownish; lower glume ca. 1/2 as long as spikelet, 3-veined, mucronate or awn-tipped; upper glume 5-veined, widely winged, awn-tipped, densely ciliate, hairs finally widely spreading along margins; lower lemma as long as upper glume but slightly firmer, awnless, often sparingly ciliolate along margins, enclosing a short hyaline, cleft palea; upper lemma dark purple or brown, glossy, beraring an awn as much as 3 mm long, margins ciliolate.

HSINCHU: Hsinchu, Hsu 1304. MIAOLI: Neima, Yamamoto et al. 42. Toufeng, Hsu 5299. TAINAN: Liuchia, Inoue s. n.

The Himalayas, India, Myanmar, China, Australia and Tropical Africa. Taiwan, in exposed red soil hillsides.

midrib 中肋: (no)not conspicuous

leaf surface 表面: (sha)upper surface with shallow notch
between the veins

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: (dki)two bundle sheaths the inner one
with conspicuous chloroplast

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

with small vein under buliform cells泡狀細胞下有小脈: (fansh)bulliform set shell-shaped or fan -shaped

chlorenchyma cell number between two adjacent veins: 1

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

distance between two adjancent vein 脈間距: 70 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 1

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


 

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  • Taiwan Grasses (CC Hsu)
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