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Taiwan Gramineae | Family List | Poaceae | Bromus

Bromus catharticus Vahl, Symb. Bot. 2: 22. 1791. Ohwi, Acta Phytotax. Geobot. 10: 107. 1941; Hitchc., Man. Grass. U. S. 34. f. 3. 1951; Keng, Fl. Ill. Pl. Prim. Sinicarum Gram. 277. f. 225. 1959; Hsu, Taiwania 16: 237. 1971; Hsu, Taiwan Grass 295. pl. 42. 1975; Hsu, Fl. Taiwan 5: 429. 1978; Koyama, Grass. Jap. Neighb. Reg. 34. f. 6. 1987; Veldkamp, Blumea 35(2): 487. 1991.

大扁雀麥

Bromus catharticus

Credit: CC Hsu, 1975 Taiwan Grasses

Bromus unioloides Kunth, H. B. K., Nov. Gen. Sp. 1: 151. 1816; Osada, Illust. Grass. Jap. Enl. Ed. 396. 1993.

Annuals, biennials or perennials. Culms ascending, 34-87 cm tall, 3 mm wide. Leaf-blades chartaceous, linear, 21-32 cm long, 5-7 mm wide, sharp at apex, veins conspicuous, puberulous to glabrous above, glabrous beneath. Sheath villous to glabrous. Ligule membranous, tongue- or triangular-shaped, rounded to acute at apex, 3 mm long. Inflorescence an open panicle, 13-31 cm long. Spikelets with 4-9 florets, elliptical, 27-28 mm long, 5-6 mm wide, strongly laterally compressed. Pedicels minutely hispid. Lower glumes subcoriaceous, minutely hispid, lanceolate, sharp at apex, 12-14 mm long, 7-nerved. Upper glumes coriaceous, broadly lanceolate, sharp at apex, 13-15 mm long, longer than 10 mm, 11-nerved, minutely strigose. Florets 19 mm long, with rachilla. Lemmas coriaceous, broadly lanceolate, margins not inrolled, acute at apex, 19 mm long, awnless, 11-nerved, minutely hispid on nerves. Paleas membranous, linear oblong, acute at apex, 8-10 mm long, 2 -nerved, ciliate on nerves. Callus glabrous. Caryopsis linear-oblong, 7 mm long, hilum linear.

TAICHUNG: Lishan, Chen Y. F. 16881, Kuoh 80088 , Hsu and Kuoh 7102 ; Wuling Farm, Chang 10891, Wang 3918 ; Piluhsi, Wang 2618 ; Chuanhsingshan Nursery Garden, Wang 1091 . NANTOU: Tsuifeng, Chen 1017 ; Shihmenshan, Chiu 2981 ; Meifeng, Tsai 17 . KAOHSIUNG: Guan-shan, Kuoh 13128.

Native of South America; introduced to many countries as a forage grass and naturalized in the central alpine region of Taiwan since 1960s.

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (bIgir)on both sides of some veins
as I-shaped girder

chlorenchyma 葉綠組織: (homog)homogenous sponge tissue

bundle sheath 維管束鞘: (nks)bundle sheaths with
small amount of 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: 7

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (lit)with a little of chloroplast

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

distance between two adjancent vein 脈間距: 285 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 4

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


 

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