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