266 A TEXT-BOOK OF GRASSES 
Nash, Revision of the Genera Chloris and Eustachys in North 
America (Op. cit. 25: 432-450. 1898). 
Nash, Revision of the Genus Triplasis (Op. cit. 25: 561-565. 1898). 
Piper, North American Species of Festuca (Contr. U. 8. Nat. Herb. 
10: 1-48. 1906). 
Scribner, The Genus Sphenopholis (Rhodora, 8: 137-146. 1906). 
Scribner & Merrill, North American Species of Chetochloa (U. 5S. 
Dept. Agr. Div. Agrost. Bull. 21. 1900). 
Scribner & Smith, Native and Introduced Species of the Genera 
Hordeum and Agropyron (U.S. Dept. Agr. Div. Agrost. Bull. 
4: 23-36. 1897). 
Shear, Revision of the North American Species of Bromus Occurring 
North of Mexico. (U. S. Dept. Agr. Div. Agrost. Bull. 23. 
1900). 
Smith, Synopsis of the Genus Sitanion (U. S. Dept. Agr. Div. 
Agrost. Bull. 18. 1899). 
