Poaceae

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Dissections:
Allolepis texana

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ALLOLEPIS Soder & H.F. Decker
Plants dioecious, caespitose or stoloniferous or rhizomatous, perennial. Culms erect or ascending, glabrous; internodes solid, terete. Leaves cauline; sheaths terete, margins open; auricles absent; ligules a ciliate membrane; blades flat (may become involute), not pungent. Panicles narrow; primary branches appressed, terminating in a spikelet. Spikelets unisexual, solitary, terete, awnless, pedicellate; pedicels without glands; florets 6-18, callus glabrous; disarticulation above glumes; reduced floret at apex; glumes (first 1-veined, second 3-veined), nearly equal, shorter than first floret, glabrous; lemmas 3-veined, coriaceous, entire, awnless, glabrous, veins glabrous; paleas 2-veined, awnless, glabrous. Staminate plants, stamens 3; anthers yellow. Pistillate plants, caryopses ellipsoid. Base chromosome number x=10.

A monotypic genus native to North America. Infrequent in the sandy, open bottomlands of west Texas and nothern Mexico. Distinguished from Distichlis by Soderstrom and Decker (1965).