Bu!. 1074, U. S. Cert z' Ar-iru'tU! 
Plate IX. 
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Eaton A 
Colorado No. 50 B 
;pik - : . " . i side views, catural size: glume* from 10i\-er. central, aud upper ponions oi spike, 
- . ; ;e: kernels in three positions and in transverse section, magnified 3 diameters. 
