Pascopyrum smithii -- Western Wheatgrass

Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln, NE.

http://plants.usda.gov/cgi_bin/large_image_rpt.cgi?imageID=agsm_002_avp.tif

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