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Taiwan Gramineae | Family List | Poaceae | Digitaria

Digitaria setigera Roem. & Schult., Syst. Veg. 2: 474. 1817; Hsu, Fl. Taiwan 5: 546, pl. 1427. 1978.


Digitaria setigera

Credit: CC Hsu

Annuals; culm to 1 m high or more, decumbent, branching and rooting at lower nodes. Blade 5-15 cm, rarely to 30 cm long, 5-10 mm wide, scabrous and undulate on margins; sheath mostly shorter than internode, often papillose-pilose; ligule 2-4 mm long, membranaceous. Inflorescence in digitate racemes, racemes 6-15, 7-14 cm long; rachis ridged, scabrous on wing-margins, ca. 0.6 mm wide; pedicel ridged or norrowly winged. Spikelet more or less pubescent, lanceolate-elliptic, 2.5-3 mm long; lower glume absent or reduced to a minute veinless scale; lower lemma equaling or slightly exceeding upper lemma, 5-7-veined; upper lemma slightly coriaceous, pale.

ILAN: Chiaochi, Hsu 823. TAIPEI: Chinshan, Hsu 1294; Fulung, Hsu 902. TAOYUAN: Neili, Hsu 1246. MIAOLI: Senghsin, Hsu 1358. NANTOU: Kauntaochi, Hsu 4228; Puli, Hsu 1373. YUNLIN: Huwei, Kao 272. TAINAN: Hsinhua, Hsu 701. KAOHSIUNG: Chishan, Suzuki 5735. PINGTUNG: Chungluan, Hsu 744. TAITUNG: Chihpen, Hsu 1000; Lutao Is., Suzuki 380304.

Tropical Asia. Taiwan, in open waste places throughout the Island.

midrib 中肋: (la)large:several vascular bundles

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 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: 3

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: 94 micrometer

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

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


Related Objects Image Gallery 
  • drawing (CC Hsu)
  • Image/JPEG
  • leaf cs section (cs kuoh)
  • Image/JPEG

    Flora of China  
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