Keywords: Achnatherum aridum HC-1950.jpg en Achnatherum aridum from Manual of the grasses of the United States USDA Miscellaneous Publication No 200 Washington DC http //plants usda gov/java/largeImage imageID star2_001_avd tif Hitchcock A S rev A Chase 1950 Template PD-USGov-USDA-NRCS PD-USGov Achnatherum aridum Manual of the grasses of the United States |