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Rothrock Grama

Bouteloua rothrockii

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Bouteloua rothrockii image scan © by Michael Plagens

Observed near Camp Creek, Maricopa Co., Arizona. September 13, 2008. A higher resolution image has been uploaded to Wikimedia Commons.

FLOWERS: Tall spikes have 4 to 7 feather-like side branches.

PERENNIAL: Short-lived, perennial grass. Plants can approach a meter in height.

LEAVES: Narrow leaves are less than 4 mm wide.

RANGE: Fairly common in the Upland Sonoran Desert in Arizona and Mexico at on rocky slopes/bajadas and in canyons; more likely in the upper elevations. Obscure until after summer rains when vigorous growth and flowering begins. Also ranges to the east from Arizona into New Mexico and Texas.


Poaceae -- Grass Family

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Bouteloua rothrockii spikelet with Attalus beetle © by Michael Plagens

Close-up view of one lateral spike; about a dozen stamens are exserted from the flowers. Observed at Mesquite Wash, Maricopa Co., Arizona. September 5, 2009. The small red beetle is a Soft-winged Flower Beetle (Attalus sp.). It will eat some pollen from the anthers ... whether it will also carry pollen from plant to plant and effect pollination is not known.

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