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Taiwan Gramineae | Family List | Poaceae | Panicum

Panicum maximum Jacq., Icon. Pl. Rar. 1: 2. 1781; Hsu, Fl. Taiwan 5: 573, pl. 1438. 1978.

大黍

Panicum maximum
drawing

Credit: CC Hsu

Perennials; rhizome stout, culm erect, node densely hirsute. Blade 30-75 cm long, to 35 mm wide; sheath papillate-hirsute to glabrous; ligule 4-6 mm long. Panicle open, 20-35 cm long, axils pilose, lower branches whorled. Spikelets 3-3.5 mm lng, obtuse, usually glabrous, faintly veined, mostly purplish red or flushed with purple; glumes unequal; lower glume ca. 1/3 length of spikelet, 1-3-veined or veinless; upper glume 5-veined; lower lemma usually staminate, rarely empty, 5-7-veined; upper lemma distinctly transversely rugose, stramineous, coriaceous.

TAIPEI: Taipei, Hsu 393. MIAOLI: Shenghsing, Hsu 1369. TAICHUNG: Shinchuang, Yamamoto & Mori 8253. NANTOU: Puli, Hsu 1389. TAINAN: Hsinmatou, Mori 239.

Originally from tropical Africa, introduced elsewhere. Taiwan, in grassland, roadsides, riverbanks, plantations and disturbed places.

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: 130 micrometer

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


 

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