Bui. 545, U. S. Dept. of Agriculture. 



Plate II. 



General Morphology of Grasses. 



A. Rhizome or rootstock. 



B. Shoot from rootstock. 



C. Sheath. 



D. Blade. 



E. Culm. 



F. Spikelike panicle of timothy. 



G. Open panicle of bromegrass. 

 H. Glumes or scales — 



(1) First glume. 



(2) Second glume. 

 I. Florets. 



J. Natural size of complete brome spikelet. Plants one-third natural size. 



