Leptaspis 囊稃竹屬
型態特徵
Monoecious perennials; culms solid, erect or ascending. Leaves strikingly distichous; sheaths laterally compressed; ligule very short; blade with a distinct pseudo-petiole, with abaxial side upwards, usually lanceolate, pinnate nerved, with numerous distinct transverse nerved. Inflorescence umbel-like or paniculate, with branches borne on all sides. Spikelets unisexual, 1-flowered, ultimate branchlets with a small male spikelet at top, with 1 or more larger female spikelets below. Male spikelets: glumes thinly membranaceous; lemma larger, conduplicate with free margins, 5-9-nerved; palea entire or shortly bidentate, 2-nerved; lodicules wanting; stamens 6, erect, filaments short, anthers linear, only tips protruding. Rudiment of pistil obsolete or minute; spikelets soon deciduous. Female spikelets: glumes thinly membranaceous; lemma much larger and firmer, usually pear-like, inflated, margins connate, leaving a small, terminal or lateral pore, 5-9-nerved, with short hooked hairs all over, enlarged and usually indurated at maturity; palea narrow, free or adnate to margins of lemma, grooved whole length on hilum-side.
Species 5. Old World tropics, in shaded forest. Only one species, L. formosana in Taiwan.
