Bromus morrisonensis Honda, Bot. Mag. Tokyo. 42: 137. 1928. Honda, Monogr. Poac. Jap. 39. 1930; Hsu, Taiwania 16: 237. 1971; Hsu, Taiwan Grass 299. pl. 44. 1975; Hsu, Fl. Taiwan 5: 430. pl. 1388. 1978; Koyama, Grass. Jap. Neighb. Reg. 35. 1987; Veldkamp, Blumea 35(2): 492. 1991.
Perennials. Culms ascending, 28-100 cm tall, 2 mm wide. Leaf-blades chartaceous, linear, 12-28 cm long, 3-5 mm wide, sharp at apex, veins conspicuous, loosely puberulous to glabrous above, villous to glabrous beneath. Sheath villous to glabrous. Ligule membranous, rounded or acute at apex, 2 mm long. Inflorescence an open or contracted panicle, 9-18 cm long. Spikelets with 5-10 florets, elliptical or lanceolate or linear lanceolate, 11-25 mm long, 2-4 mm wide, slightly laterally compressed. Pedicels minutely hispid. Lower glumes membranous on margins, glabrous to minutely hispid, lanceolate to linear-lanceolate, sharp at apex, 4-6 mm long, 1-nerved. Upper glumes chartaceous, broadly lanceolate, sharp at apex or acute to obtuse at apex, 5-8 mm long, shorter than 10 mm, 3-nerved, minutely strigose to glabrous. Florets 8-9 mm long, with rachilla. Lemmas chartaceous, lanceolate to elliptical, margins inrolled, rounded at apex or acute at apex, 8-9 mm long, shorter than 20 mm, with awn, with a awn longer than half to nearly as long as lemma, 3 -nerved, hairy or glabrous, only slightly hairy on the base of nerves. Paleas membranous, linear oblong, round or truncate at apex or acute at apex, 6-7 mm long, 2 -nerved, ciliate on nerves to minutely ciliate on nerves. Callus glabrous. Anthers 2.5 mm long. Caryopsis linear-oblong, 6 mm long, hilum linear.
HSINCHU: Mt. Itse, Shimada 509 . TAICHUNG: Wuling, Huang 7055 ; Mt Hsuehshan, Koyama 23944 ; Lu 20041 . NANTOU: Meifeng, Tsai 11 ; Mt. Hohuanshan, Peng 8312 ; en route from Tongpu to Tzuchung, Hsu 7432 ; Patungkuan, Huang 8505, Kuoh 14492; en route from Paiyun Hiking Resort to Monroo cliff, Hsu 6331 . CHIAYI: Mt. Yushan, Sasaki s. n. Nov. 1. 1933 ; en route from Tatachia to Paiyun Hiking Resort, Kuoh 1283 ; en route from Tatachia to Chien-hon-ko, Chen Y. F. 11339 ; Nan-tau-hsien-chi, Kuoh 10246 . KAOHSIUNG: Fukuyama s. n. Jul. 12. 1935 ; en route from Tienchih to Yakou on South Cross Highway, Huang 8890 ; Guan-shan-lin, Kuoh 12471 . ILAN: Mt. Nanhutashan, Kao 5200 ; Hsu 5907 ; Suzuki 17627 . TAITUNG: Mt. Takuanshan, Peng 11724 .
Distributed in Malesia, Philippines and Taiwan.
Common in the alpine regions.
This speices was thought to be an endemic taxon of Taiwan till 1991. Veldkamp (1991) reported it was also distributed in Malesia and Philippines although it was very rare in the two countries.