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Taiwan Gramineae | Family List | Poaceae | Digitaria

Digitaria heterantha (Hook. f.) Merr., Enum. Philipp. Fl. Pl. 1: 54. 1923; Hsu, Fl. Taiwan 5: 541. 1978.

粗穗馬唐

Digitaria heterantha
leaf cs section

Credit: cs kuoh

Paspalum heteranthum Hook. f., Fl. Brit. India 7(21): 16. 1896.

Perennials; culm stoloniferous, branching at lower nodes. Blade 5-15 cm long, 3-6 mm wide; sheath subcompressed; ligule membranaceous, ca. 2 mm long. Racemes 2, rarely 3, more than 15 cm long; rachis triangular, rigid, winged, axils hairy. Spikelet ca. 4 mm long, paired, pedicellate one villous, sessile one glabrous, rather far apart on rachis, lanceolate; lower glume veinless, ca. 0.7 mm long; upper glume lanceolate, more than 1/2 as long as spikelet, 3-veined, glabrous in sessile spikelet, appressed pubescent in pedicellate spikelet lower lemma strongly 9-veined, acuminate, glabrous in sessile spikelet and with spreading hairs in pedicellate spikelet; upper lemma lanceolate, acuminate, pale and slightly coriaceous; anther ca.1 mm long.

TAICHUNG: Tachia, Suzuki 6944. YUNLIN: Huwei, Suzuki 6162. TAINAN: Yainan, Hsu 534. TAITUNG: Lutao Is., Sasaki s. n.

Tropical Asia. Taiwan, railroad-sides and littoral of the central and south parts.

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (ecstr)strand enclosed by colorless cells
and epidermis

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

buliform cells well developed 泡狀細胞發達: mainly appear in adaxial side

with small vein under buliform cells泡狀細胞下有小脈: (lareg)bulliform set olive-shaped sometimes
with colorless cells

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: 85 micrometer

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

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


 

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