Chrysopogon 金鬚茅屬
型態特徵
Annuals or perennials; culms erect or ascending. Ligule membranaceous, sometimes ciliate; blade linear. Inflorescence a branched panicle, primary branches solitary, simple or branched at base, branches often in whorls, usually bearing only one terminal triad of spikelets. Spikelets in triads, 2 pedicelate and 1 sessile, sometimes with another 1 or 2 pairs of spikelets below triad, one of pair pedicelate, one sessile; rachis very obliquely articulate below triads. Sessile spikelet laterally compressed; glumes subcoriaceous, with nerves less distinct on outer side of spikelet; lower glume glossy, often with spiny tubercles, with inrolled margins, back rounded, or conduplicate and keeled upwards; upper glume usually keeled, sometimes awned; lemmas shorter, membranaceous; lower lemma 2-nerved; lower palea wanting; upper lemma entire, 2-toothed, or 2-lobed, usually with a geniculate awn from apex; upper palea wanting or small; hyaline and nerveless; lodicules 2, small, cuneate, glabrous; stamens 3 ; ovary glabrous, styles 2, free, stigmas exserted laterally near base. Caryopsis narrowly oblong, laterally compressed; embryo 1 J2 as long as caryopsis. Pedicelate spikelet often different in color from sessile ones, dorsally compressed, barren or sometimes staminate; pedicels slender, pressed against slightly longer sessile spikelets, not glossy.
About 25 species distributed in the tropical and subtropical regions, especially in the Old World; one cosmopolitan species C. aciculatus is found very commonly in Taiwan.
