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Taiwan Gramineae | Family List | Poaceae | Microstegium

Microstegium geniculatum (Hay.) Honda, Monogr. Poac. Jap. 410. 1930. Hsu, Fl. Taiwan 5:674. 1978.

曲膝莠竹

Microstegium geniculatum

Credit: CS Kuoh, 2004 line drawing

Pollinia geniculata Hayata, Icon. Pl. Formos. 7: 73. 1918.
Microstegium fauriei Honda subsp. geniculatum (Hay.) Koyama, Grass. Jap. Neighb. Reg.429. 1987

Culm geniculate, about 1 mm in diameter. Blade 6-8 cm long by 5 mm wide; ligule tongue-shaped, pubescent on the back. Racemes 4, subdigitately arranged, 5-8 cm long. Spikelets paired, monomorphic, the upper pedicellate, the lower sessile, about 3.5 mm long; rachis-joint longer than the spikelet. Lower glume linear, as long as the spikelet, subcoriaceous, 2-keeled, short ciliate along keels, furrowed and siliceous on the back, 2-toothed at the apex; upper glume deltoidlanceolate, 1-keeled, margins inrolled, fimbriate, about 3 mm long, with a slender awn of about 3.5 mm long. Lower floret reduced. Upper floret minute, chartaceous, lemma about 0.3 mm long, with an awn 14-20 mm long.

TAIPEI: Keelung, Hsu 399. ILAN: Taipingshan, Suzuki s. n. Aug. 15, 1928. HSINCHU: Nankengchih, Hsu 505. MIAOLI: Senghsing, Hsu 1368. TAICHUNG: Anmashan, Chuang 713, Kao 4439. NANTOU: Chitou, Kuoh 3684, Hsu 6150. CHIAYI: Fenchihu, Feng 4938. HUALIEN: Mukuashan, Nakamura 4636.

Usually growing in underforest roadside of mountainous regions.

midrib 中肋: (la)large:several vascular bundles

leaf surface 表面: (fla)flat surface

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

chlorenchyma 葉綠組織: (inrad)somewhat radiate and equal or
slightly large
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: (nobul)if present only along side of midrib

chlorenchyma cell number between two adjacent veins: 2-3

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

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

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

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Related Objects Image Gallery 
  • Image/JPEG (cs kuoh, 2004 leaf anatomy)
  • Image/JPEG
  • Image/JPEG (CS Kuoh, 2004 line drawing)
  • Image/JPEG
  • Image/GIF (CC Hsu, 1975 Taiwan Grasses)
  • Image/GIF

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