Dactyloctenium 龍爪茅屬
型態特徵
Annuals or perennials; culms more or less compressed, filled with pith, glabrous, long internodes sometimes alternating with one or more short ones; ligule short. Blades flat. Inflorescence consisting of secund, digitately arranged spikes, rarely solitary. Spikelets crowded, sessile, alternate on abaxial side of rachis with upper glume on outer side of spike, at first imbricate, afterward spreading, strongly laterally compressed, 2-4-flowered, ultimate floret rudimentary, others bisexual; rachilla not produced, articulate below lower lemma; glumes shorter than spikelet, deeply cymbiform-keeled, 1-nerved; lower glume acute, persistent; upper glume mucronate or with short awn, rarely obtuse, 2-keeled, long-persistent; lodicules 2, cuneate; stamens 3; ovary glabrous, styles 2, free, stigmas narrow. Caryopsis ellipsoid, terete or compressed, rugose, granulate or smooth, apex notched, truncate or rounded; pericarp thin, free, embryo to 1/2 as long as caryopsis, hilum punctiform, basal.
About ten species in warm climates. One common weed, D. aegyptium in Taiwan.
