Arrhenatherum elatius

變葉燕麥草

naturalized

Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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Hitchc., Fl. Čech. 17. 1819.

Arrhenatherum elatius (L.) Presl f. variegatum Hitchc.

Hsu, Taiwan Grasses 255. pl. 22. 1975. (Taiwan Grass., 台灣的禾草)

herb

Rhizome well developed; culms swollen at basal nodes, erect, 50-100 cm high.
Blades 10-20 cm long, 40-90 mm wide, with distinctly yellow and white stripes; ligule 1-3 mm long.
Panicle erect to inclined, 8-25 cm long, branches whorled. Spikelets 2-flowered, monomorphic, 8-10 mm long, light green, occasionally purplish, shining; lower glume 1/2 as long as spikelet, 1-nerved; upper glume as long as spikelet or slightly shorter, 3-nerved.
Lower floret male; lemma 7-nerved, basal part sparingly long hairy, with a stout awn from very base, awn geniculate, twisted. Upper floret bisexual; lemma 7-nerved, basal part long hairy, awnless or with short straight awn.