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Taiwan Gramineae | Family List | Poaceae | Trisetum

Trisetum bifidum (Thunb.) Ohwi, Bot. Mag. Tokyo. 45: 191. 1931. Hsu, Taiwan Grass. 285. pl. 37. 1975; Hsu, Fl. Taiwan 5: 422. 1978; T. Koyama, Grass. Jap. Neighb. Reg. 155. 1987.

三毛草

Trisetum bifidum
leaf cs section

Credit: cs kuoh

Perennial, densely tufted; culms erect, 35-70 cm tall, 1-2 mm in diameter, ligule membranous, tongue-shaped, 0.2 -1.5 mm; leaf-blades 10-20 cm long, 3-4 mm wide. Panicle slightly open, 10-20 cm long, often inclined above, shiny. Spikelet 2-3-flowered, 6-9 mm long, rachilla joints 1.5 mm long; glumes chartaceous, lanceolate, unequal, lower glume 2-3.5 mm long, 1-nerved, upper glume 5-7 mm long, 3-nerved; lemma 5-8 mm long, chartaceous, scabrous, the apex shallowly bifid with acuminate lobes awn arising from the sinus, 6-10 mm long, geniculate; palea membranous, 3.5-4.5 mm long, ciliate on keel, the apex deeply bifid.

CHIAYI: Mt. Alishan, Kao et al. 6217; Hsu 5394.

Japan, Korea and China.

Growing in high mountain area at 2000 m.

midrib 中肋: (sm)small:with one vascular bundle

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (abscl)on abaxial side of vein

chlorenchyma 葉綠組織: (homog)homogenous sponge tissue

bundle sheath 維管束鞘: (nke)bundle sheaths without chloroplast

buliform cells not well developed 泡狀細胞不發達: (irreg)epidermal cells irregular in size

chlorenchyma cell number between two adjacent veins: 7

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (not)no chloroplast

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

distance between two adjancent vein 脈間距: 250 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 7

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


 

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