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Taiwan Gramineae | Family List | Poaceae | Isachne

Isachne albens Trin., Sp, Gram. Icon. l: Pl. 85. 1828. Hook. f., Fl. Brit. Ind. 7:24. 1879; Ohwi in Acta Phytotax. Geobot. 11: 54. 1942; Keng, l. c. 640. f. 576. 1959; Bor, Grass. India 579. 1960; Backer & van den Brink, Fl. Java 3: 582. 1968; Hsu in Taiwania 16: 270. 1971, Taiwan Grass. 465. pl. 127. 1975; Gilliland, Grass. Malaya 121. 1971.


Isachne albens
leaf cs section

Credit: cs kuoh

Isachne arisanensis Hayata, Icon. Pl. Form. 7: 57. 1918; Honda, Monogr. 278. 1930.
Isachne stricta Elmer, Leafl. Philip. Bot. 2: 463. 1908; Chase in Journ. Arnold Arb. 24: 88. 1943.
Isachne elatiuscula Ohwi in Bot. Mag. Tokyo 56: 5. 1942.

Culm slender, 30-90 cm long. Blade firm, narrowly lanceolate, 7-15 cm long by 4-9 mm wide, revolute when dry; sheath loose, shorter than the internode, ciliate on the margins; ligule a row of hairs, about 2 mm long, Panicle 10-20 cm long, pyramidal, branches smooth, spreading when mature. Spikelets 1-1.2 mm long, subglobose; glumes equal, 7-9-nerved, equaling the spikelet or slightly, shorter, glabrous, more or less hispid toward the apex. Florets monomorphic, globose to elliptical-ovate, obtuse, glabrous or puberulent, rachilla short, terete.

TAIPEI: Taipei, Chang 3903. ILAN: Tayuanshan, Kuo 159. TAlCHUNG: Pahsienshan, Hsu 447. NANTOU: Chushan, Hsu 88. CHIAYI: Mt. Alishan, Kao 3337. TAITUNG: Chihpenyue, Suzuki 10906. HUALlEN: Mukuashan, Nakamura 4396.

Widely distributed in Southeast Asia.

Locally grows at medium altitudes along forest margins. This is a very common and abundant grass.

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: (isach)cells elongate and radiate upward
like crab legs

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

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

with small vein under buliform cells泡狀細胞下有小脈: (fansh)bulliform set shell-shaped or fan -shaped

chlorenchyma cell number between two adjacent veins: 4

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: 5

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


Related Objects Image Gallery 
  • leaf cs section (cs kuoh)
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  • leaf cs section 2 (cs kuoh)
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  • Image/JPEG (CC Hsu, 1975 Taiwan Grasses)
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    Flora of China  
  • Illustration
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