生活型

herb

形態特徵

• Perennial, with short rhizomes ca. 5 cm long. Culms to 30 cm tall, nodes articulate, exposed.
• Ligule 0.5-2 mm long, membranous, margin with ciliate hairs; blades linear, ca.10 cm long.
• Inflorescence a spreading panicle, ca. 10 cm long. Lower glume lanceolate, ca. 5 mm long, 1-veined, apex acuminate; upper glume elliptical to lanceolate, ca. 5 mm long, slightly shorter than lower glume, apex acuminate. Spikelet with 1-3 florets, only the basal one or two florets fertile; terminal or second floret sterile. Callus hairy, the hairs ca. 1/2 -1/3 as long as lemmas. Lemma ovate, boat-shaped, ca. 4.5 mm long, 5-veined, central vein connected to an awn, the awn arising from lower part of the lemma; marginal and middle veins enter into narrow teeth at apex; margin of apex ciliate. Palea ca. 3.5 mm long, 2-veined, membranous, hyaline, apex truncate. Lodicules 2, lanceolate to ovate, ca. 1 mm long, hyaline.
• Anthers ca. 1.5 mm long. Terminal floret reduced, with one lemma, ca. 3 mm long; or one awn, 4.5-5 mm long. Second floret similar to first floret if fertile, slightly shorter than first floret; if sterile, lemma linear, margin membranous, shorter than fertile one. Rachilla hairy, hairs ca. as long as callus hairs.

分布

• 世界 : It is distributed from western North America, Alaska to northern Europe.

引證標本

it occurs at Tianchih, and along the Ya-Kou Forestry Road, Taoyuan Hsiang, Kaohsiung Hsien; and from Da-Kuanshan Tunnel to Shian-Yang, along the Southern Cross-Island Highway, Hai-duan Hsiang, Taitung Hsien.

引用文獻

• Ming-Jer Jung, Tian-Shung Wu and Chang-Sheng Kuoh, Taiwania 51(1): 29. 2006.