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Taiwan Gramineae | Family List | Poaceae | Panicum

Panicum dichotomiflorum Michx., Fl. Bor.-Amer. 1: 48. 1803; Hsu, Fl. Taiwan 5: 572. 1978.

洋野黍

Panicum dichotomiflorum
drawing

Credit: CC Hsu

Annuals; culms branched, glabrous, 30-100 cm high. Blade 15-40 cm long, 7-20 mm wide; midrib stout, greenish white; ligule short, upper margin a ring of hairs; sheath cylindrical, glabrous and shining. Panical ca. 30 cm lkong, branches scabrous, 1-5 per node, arranged at 45o angle to central axis. Spikelets sparingly arranged, ovate-oblong to lanceolate-elliptic, acute, ca. 2.3 mm long, glabrous; lower glume broadly deltoid, obtuse or roumded, clasping vase of spikelet, 1/4-1/5 as long as spikelet; upper glume subequal to spikelet, 5-7-veined; lower lemma and upper lemma subequal, flat; upper lemma oblong, glabrous and shining, 5-veined, prominrnt when mature, tightly enclosing upper palea and caryopsis.

TAICHUNG: Kuanshan, Hsu & Kuoh 80129.

Originally from America, naturalized in temperate countries. Taiwan, in villages at mid-elevation in the central part of the island.

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

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

distance between two adjancent vein 脈間距: 164 micrometer

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


 

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