生活型

herb

形態特徵

• Annuals, biennials or perennials. Culms ascending, 34-87 cm tall, 3 mm wide.
• leaf blade 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 membranaceous, 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, elliptic, 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 membranaceous, linear oblong, acute at apex, 8-10 mm long, 2-nerved, ciliate on nerves. Callus glabrous. Caryopsis linear-oblong, 7 mm long, hilum linear.

分布

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

引證標本

TAICHUNG: Lishan, Chen 16881, 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: Guanshan, Kuoh 13128.

參考文獻

• HSU, Chien-Chang, Flora of Taiwan, second edition 5: 370. 2000.  (Fl. Taiwan 2nd edit.)