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Taiwan Gramineae | Family List | Poaceae | Brachiaria

Brachiaria subquadripara (Trin.) Hitchc., Lingnan Sci. J. 7: 214. 1931;. Hsu, Fl. Taiwan 5: 533.1978.

四生臂形草

Brachiaria subquadripara
leaf cs section

Credit: cs kuoh

Panicum subquadripara Trin., Gram. Panic. 145. 1826.
Urochloa subquadripara (Trin.) R. D. Webster, Austral. Paniceae 252. 1987; Veldkamp, Blumea 41: 429. 1996.

Culms slender, straggling or suberect, often spreading, rooting at lower nodes, nodes pubescent. Blades 3-15 cm long, 4-8 mm wide, glabrous or sparsely pilose, margins scabrous; sheath usually shorter than internode and more or less ciliate on margins; ligule a row of hairs, 1-2 mm long. Racemes 3-6, spreading, rather distant along glabrous or sparsely hairy axis; rachis flattened, glabrous or sometimes with scattered stiff hairs. Spikelets solitary, elliptic, 3.1-4.3 mm long, gglabrous; glumes 5-7- veined; lower lemma faintly 5-veined; anther ca. 1.2 mm long.

The tropics of the Old World, and introduced elsewhere. Taiwan, in lowland open waste places, roadsides and moist grassy places.

ILAN: Chiaochi, Hsu 827. TAIPEI: Chinshan, Hsu 1289; Shimen, Hsu 1261. HSINCHU: Hsinchu, Hsu 1313. MIAOLI: Tapu, Hsu 708. TAICHUNG: Taichung, Yamamoto 239. NANTOU: Puli, Hsu 1372. YULIN: Huwei, Hsu 472. TAINAN: Chiali, Mori 651. PINGTUNG: Chutien, Hsu 526; Kenting, Hsu 1100. TAITUNG: Chihpen, Hsu 334. HUALIEN: Yuli, Yamamoto 3040.

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: (radia)cells radiate and lesser than
bundle sheath cell in width

bundle sheath 維管束鞘: (dko)two bundle sheaths the outer one
with conspicuous chloroplast

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: (bcfan)bulliform cell with colorless cells
extend beneath it

chlorenchyma cell number between two adjacent veins: 2

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
mestome sheath

distance between two adjancent vein 脈間距: 140 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: lobed


 

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  • leaf cs section (cs kuoh)
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