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Taiwan Gramineae | Family List | Poaceae | Leersia

Leersia hexandra Swart, Prodr. Veg. Ind. Occ. 21. 1788; Honda, Monogr. Poac. Japon. 6. 1930; Hsu, Fl. Taiwan 5: 377. 1978; Koyama, Grass. Jap. Neighb. Reg.23. 1987.

李氏禾

Leersia hexandra
leaf cs section-2

Credit: cs kuoh

Loosely tufted perennial; culm base decumbent, rooting at nodes; swollen nodes retrorsely puberulent; ligules membranous, 1-2 mm long; leaf-blades narrowly linear-lanceolate, 3-15 cm long, 2-6 mm wide, scabrous. Panicle loose, narrowly elliptic. Spikelets 3-5 mm long, 1.2-1.5 mm wide, contracted at base; lemma 5-nerved, boat-shaped, hispidulous, bristly-hispid on keel; palea same texture and length as lemma, 3-nerved.

TAIPEI: Tanshui, Hsu 189. TAOYUAN: Taoyuan, Chuang 4600.. NANTOU: Chinshuikou, Kao 276. TAINAN: Hsinhua, Hsu & kuoh 13657. KAOHSIUNG: Fengshan, Chuang 4148. PINGTUNG: Tungkan, Kao 128.

Pantropics; suthern Ryukyus, Taiwan, and Hainan in eastern Asia.

Wet place.

midrib 中肋: (rh)rhomboid:rhomboid outline with
two vascular bundles

leaf surface 表面: (mid)upper surface with middle 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: (armed)compact armed cells

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

buliform cells well developed 泡狀細胞發達: (bboth)appear both in adaxial and abaxial side

chlorenchyma cell number between two adjacent veins: 9

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: 165 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


 

Related Objects Image Gallery 
  • leaf cs section-2 (cs kuoh)
  • Image/JPEG
  • specimen (cs kuoh)
  • Image/JPEG
  • Image/GIF (CC Hsu, 1975 Taiwan Grasses)
  • Image/GIF

    Flora of China  
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  • Illustration

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