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Taiwan Gramineae | Family List | Poaceae | Paspalum

Paspalum distichum L., Syst. Nat. ed. 10. 2: 855. 1759; Hsu, Fl. Taiwan 5: 583, pl. 1441. 1978.

雙穗雀稗

Paspalum distichum
drawing

Credit: CC Hsu

Perennials; stolon creeping, stout, flowering culm very short, 20-50 cm tall, nodes thickened and pubescent. Blade 5-10 cm long, 3-7 mm wide, glabrous; sheath glabrous, margins ciliate; ligule membranaceous, truncate and fringed, 2-3 mm long, glabrous abaxially; Racemes 2, 2-6 cm long; rachis 1.5- 2 mm wide, flat. Spikelets solitary, obovate-oblong, acute, loosely pubesent, ca. 3 mm long; lower glume usually absent, developed in a few spikelets, triangular in shape, ca. 0.3 mm long; upper glume appressed pubescent; lower lemma 3-5-veined, usually glabrous, acute; upper lemma nearly as long as spikelet, coriaceous, pale green, acute, hairy at apex.

KEELUNG: Keelung, Hsu 403. HSINCHU: Hsinchu, Shimada 360B. TAINAN: Morimoto 257. PINGTUNG: Hengchun, Hsu 503, TAITUNG: Chihpen, Hsu 311.

The tropics and subtropics of the world. Taiwan, in roadsides, dampy places and along ditches.

midrib 中肋: (no)not conspicuous

leaf surface 表面: (nod)nodules on both surfaces

sclerenchyma 厚壁組織: (mistr)strand variable with size of vein

chlorenchyma 葉綠組織: (radia)cells radiate and lesser than
bundle sheath cell in width

bundle sheath 維管束鞘: (sk)single bundle sheath with
conspicuous chloroplast

with small vein under buliform cells泡狀細胞下有小脈: (fansh)bulliform set shell-shaped or fan -shaped

chlorenchyma cell number between two adjacent veins: 2

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (out)large amount and in centrifugal site

mestome sheath 內束鞘細胞: (Xyms -)metaxylem pole adjacent with
outer bundle sheath

distance between two adjancent vein 脈間距: 51 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 3

chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed


 

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