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Taiwan Gramineae | Family List | Poaceae | Imperata

Imperata cylindrica var. major (Nees) C. E. Hubb. ex Hubb. & Vaughan, Grass. Maur. 96. 1940; Hsu, Fl. Taiwan 5: 661. 1978.


Imperata cylindrica var. major
leaf cs section

Credit: cs kuoh

Lagurus cylindrica L., Syst. Nat. ed. 10. 878. 1759.
Imperata koenigii var. major Nees, Fl. Afr. Austr. 90. 1841.

Perennials; rhizomes well developed, densely scaly; culms tufted, erect 2-5-noded, nodes bearded. Ligule membranous, obtuse. Spikelets paired, lanceolate or oblong, monomorphic, awnless, surrounded by long silky hairs, about 3 mm long; glumes lanceolate or oblong, nearly equal, membranous, as long as the spikelet, margins ciliate; lower lemma laceolate, hyaline, about 2 mm long; palea wanting; upper lemma lanceolate, hyaline, about 1.5 mm long, palea fringed at the apex, truncate, slightly smaller than the lemma; anthers 2.

TAIPEI: Kuangyinshan, Hsu 1135; Keelung, Kao 4312*. ILAN: Kueishan, Hsu 867; Suao, Hsu 866. HSINCHU: Hsinchu, Hsu 1308. TAOYUAN: Neili, Hsu 1229: MIAOLI: Tahu, Chen 76; Chingchui, Hsu 114. TAICHUNG: Kukuan, Hsu 460. CHANGHUA: Wanggong, Guo et al. 030. NANTOU: Chungshuigo, Huang 59. CHIAYI: Chiayi, DeVol. 7092. TAINAN: Hsinghua, Hsu 183, PENGHU: Penghu, Huang & Kao 214, PINGTUNG. Pingtung, Hsu & Keng 214. TAITUNG: Chipen, Hsu 974; Botel Tobago, Sasaki,s. n. May 5, 1927.

Distributed in warm and temperate parts of Asia, extending to Australia; East and South Africa.

This is one of the most common grasses found on sunny exposed soils. The rhizomes are sold for medicinal purposes in Taiwan.

midrib 中肋: (la)large:several vascular bundles

leaf surface 表面: (sha)upper surface with shallow notch
between the veins

sclerenchyma 厚壁組織: (boscl)(bostr)on both sides of veins as
strand or girder

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

bundle sheath 維管束鞘: (dko)two bundle sheaths the outer one
with conspicuous chloroplast

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

no small vein under buliform cells泡狀細胞下無小脈: (bcfan)bulliform cell with colorless cells
extend beneath it

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
mestome 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: 2

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


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  • Image/GIF (CC Hsu, 1975 Taiwan Grasses)
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  • Image/JPEG (CS Kuoh)
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  • leaf cs section (cs kuoh)
  • Image/JPEG

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