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Taiwan Gramineae | Family List | Poaceae | Brachiaria

Brachiaria mutica (Forssk.) Stapf, Fl. Trop. Afr. 9: 526. 1919. Hsu, Fl. Taiwan 5: 530. pl. 1422.


Brachiaria mutica
Taiwan Grasses

Credit: CC Hsu 1975

Panicum muticum Forssk., Fl. Aegypt.-Arab. 20. 1775.
Urochloa mutica (Forssk.) T.-Q. Nguyen, Novosti Sist. Vyss. Rast. 13: 13. 1966; Veldkamp, Blumea 41: 424. 1996.

Perennials; culm stout, 5-8 mm in diam., decumbent and rooting at basal nodes, 2-5 mm long, node densely villous. Blades pubescent, 10-30 cm long, 10-15 mm wide; sheath villous, longer than internode; ligule ca. 1.3 mm long, membranaceous, ciliate at apex. Inflorescence of racemose racemes, racemes 12-20 cm long, rather distant, stout, simple or divided below; rachis narrow, scabrid, slightlly flattened; pedicel bristled. Spikelets usually paired, turgid, numerous, crowded on one side, ca. 3.5 mm long, elliptic, glabrous, green or purplish; lower glume triangular, 1-veined; upper glume and lower lemma subequal, 5-veined; lower lemma always paleate; lower palea slightly longer than spikelet; upper lemma elliptic, obtuse, margins narrowly incurved, obscurely dotted or roughened; anther ca. 2 mm long.

TAIPEI: Taipei, Chang 10003; Wanshenlee, DeVol 8370. HSINCHU: Hsinchu, Shimada 5509B. KAOHSIUNG: Hsiaokang, Suzuki 211. HUALIEN: Hualien, Shimizu & Kao 10678.

Originally from Brazil, introduced and naturalized elsewhere. Taiwan, in open and shady areas, also in swampy places.

leaf surface 表面: (nod)nodules on both surfaces

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: 115 micrometer

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


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