小觿茅 xiao xi mao

Dimeria ornithopoda Trinius var. parva Keng & Y. L. Yang, J. Nanjing Univ., Nat. Sci. Ed. 1980(4): 108. 1980.

Annual. Culms erect, 5–11 cm tall, 5–15-noded, much branched, nodes slightly pubescent or subglabrous. Leaf sheaths glabrous, longer than internodes except the uppermost; leaf blades linear-lanceolate, 1–3.5 × 0.1–0.25 cm, adaxial surface brownish, abaxial surface pale brown, loosely tuberculate-hairy at base, otherwise glabrous; ligule 0.5–0.7 mm. Racemes 2, 1–2.5 cm; rachis triquetrous, smooth on angles. Spikelets 3–3.5 mm, reddish brown; glumes papery with membranous margins, glabrous, upper glume winged along keel, apex acute or acuminate; upper lemma subentire; awn flexuous, 0.5–2.5 mm, usually exserted from spikelet; upper palea absent. Anthers yellow, ca. 0.5 mm. Caryopsis ca. 1.5 mm.

* Streams. Taiwan.

This species differs from Dimeria ornithopoda by its much-branched habit, subglabrous nodes, and subentire upper lemma with a straight awn included within the spikelet.