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Taiwan Gramineae | Family List | Poaceae | Panicum

Panicum bisulcatum Thunb., Nova Acta Regiae Soc. Sci. Upsal. 7: 141. 1815; Hsu, Fl. Taiwan 5:569, pl. 1435. 1978.


Panicum bisulcatum

Credit: CC Hsu

Annuals; culm weak, slender, 30-120 cm high, branching and prostrate. Blade 5-30 cm long, 4-10 mm wide, thin; sheath glabrous, margins ciliate; ligule truncate, membranaceous, ca. 0.5 mm long, irregularly fringed with hairs. Panicle open, ovate or deltoid, 12-40 cm in length and width. Spikelets acute, ca. 2 mm long, elliptic, faintly dark green, sometimes purplish; lower glume triangular, acuminate or acute, 1/3 as long as spikelet; upper glume and lower lemma similar, acute, finely 5-veined, membranaceous, elliptic, 15-18 mm long, obtuse, smooth, shiny, greyish brown when mature.

TAIPEI: Kuanyingshan, Hsu 588. MIAOLI: Senghsin, Hsu 1354. TAICHUNG: Taian, Hsu 545. NANTOU: Puli, Hsu 1371.

India, Malesia, Australia, China and Japan. Taiwan, in lowland forest margin.

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: (isach)cells elongate and radiate upward
like crab legs

bundle sheath 維管束鞘: (nks)bundle sheaths with
small amount of chloroplast

buliform cells not well developed 泡狀細胞不發達: (smreg)epidermal cells gradually enlarge
from vein to intervein

chlorenchyma cell number between two adjacent veins: 5

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (lit)with a little of chloroplast

mestome sheath 內束鞘細胞: (Xyms+)metaxylem pole adjacent with
mestome sheath

distance between two adjancent vein 脈間距: 161 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 2


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