Poaceae

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Inflorescences

Dissections:
Cathestecum erectum

CATHESTECUM Presl.
Plants hermaphroditic, caespitose or stoloniferous, annual or perennial. Culms erect or ascending or decumbent, glabrous; internodes solid, terete. Leaves mostly basal, not distinctly distichous; sheaths terete, margins open; auricles absent; ligules a dense line of hairs ; blades flat or folded, linear, stiff, apex acuminate. Panicles spike-like with several spicate primary branches; branches with 3 spreading spikelets, terminating in a bare point. Two lower spikelets on each branch staminate or neuter. Upper spikelet on each branch perfect (fertile), laterally compressed, disarticulation below the glumes, awned, pedicellate; florets 3, reduced florets (2) above perfect floret (1), callus hairy, rachilla not extended beyond upper floret, awned; glumes 2, first veinless, second 1-veined, unequal, shorter than first floret, hairy, awned; lemmas usually 3-veined (some 5-7), membranous or chartaceous, hairy, apex irregularly 4-lobed, awned; paleas 2-veined, awnless or awned, glabrous. Stamens 0 or 3; anthers yellow. Caryopses (?). Base chromosome number x=10.

A New World genus of about six species. Our species is infrequent in the desert regions of the Trans Pecos. This grass is not considered important for livestock forage.