生活型

herb

形態特徵

• Perennial, with slender stolons. Culms erect from a shortly prostrate or geniculateascending base, 60-75 cm tall, 1-2.5 mm thick, smooth, with 5 or 6-nodes, often branching from each node.
• Leaves basal and cauline; sheath glabrous; ligules ovate-oval, 1.5-3.5 mm long, the apex truncate to obtuse and usually erose, dorsally minutely scabrid; blades linear, 15-18 cm long, 1.5-2 mm wide, thinly herbaceous, soft, flat, green, scabrous above.
• Panicle erect, exserted or the base enclosed, 15-24 cm long; branches 2-9-(15)-nate, unequal, scabrous, the longest one up to 10 cm long, naked at the base with spikelets in the upper half of the branches. Spikelets light-green and often tinged with purple, 2-2.5 mm long. Glumes slightly unequal with the lower glume longer than the upper one, lanceolate, acute, 1-nerved, the keel scabrous. Lemmas occurring in two main forms, one awned and other one muticous, but with various intermediate forms within the same panicle. Awned lemmas usually are present in the terminal spikelets of primary branches, membranous-hyaline, hairy on the adaxial surface, 1.6-1.8 mm long, 3- nerved, the apex toothed from the lateral nerves, the awn arising from immediately above the base of the lemma, 1.5-2 mm long, rarely reduced to a minute tooth; trichodium-net present; callus bearded with long hairs attaining 0.2-0.25 as long as the lemma. Palea hyaline, 0.5-0.6 times as long as the lemma, apex bifid, weakly 2-nerved. Awnless lemmas usually occur in the other spikelets, membranous-hyaline, 1.6 mm long, 3- nerved, apex obtuse, entire or minutely 2-toothed, midrib with a minute tooth arising from near the apex or middle of the lemma, glabrous; trichodium-net present; callus glabrous. Palea hyaline, 0.5-0.6 times as long as the lemma, apex bifid, weakly 2-nerved. Anthers 3, 0.8-1.2 mm long.

分布

• 台灣 : Extremely rare, presently known only from Nantou Hsien, Hsin-I Hsiang, on roadside,

參考文獻

• Chang-Sheng Kuoh, Taiwania 48(2): 94-98. 2003.