the forage conditions on the ranges of South Dakota and northwestern Wyo- 

 ming. The cultivated grasses and forage plants are treated somewhat in detail, 

 as are also the native plants of the same class. 



No. 13. — The Red Desert of Wyoming and Its Forage Resources. 

 By Aven Nelson. Pp. 72. pis. 5, figs. 24. 1898. 



This bulletin treats of the topography of the soils and climate of the Red 

 Desert of Wyoming, the characteristic desert plants and forage plants of the 

 summer range, and closes with a list of the plants of the Red Desert based upon 

 specimens secured by the author during the summer of 1897, 



No. 14. — Economic Grasses. By F. Lamson-Scribner. Pp. 85, pis. 

 3, figs. 91. 1898. 



This is practically a revision of Bulletin No, 3, with the addition of some 

 new figures and plates. The work closes with a list of grasses for special soils 

 or uses. 



No. 15. — A Report upon the Forage Plants and Forage Resources of 

 the Gulf States. By S. M. Tracy. Pp. 55, figs. 20. 1898. 



This work treats of the soils and natural pastures of the Gulf States, forma- 

 tion of pastures, the leading forage plants and the more important hay and pas- 

 ture grasses and miscellaneous forage crops. 



No. 16. — Grazing Problems in the Southwest and How to Meet Them. 

 By Jared G. Smith. Pp. 47, figs. 9. 1899. 



This bulletin treats of the former condition of the ranges, their present con- 

 dition, and the causes which have led to their deterioration, the renewing of the 

 cattle ranges, the relation of land laws to range improvement, etc. 



No. 17. — American Grasses, II. By F. Lamson-Scribner. Pp. 349, 

 figs. 325. 1899. 



A revised edition of this work was published in 1901. This work is a con- 

 tinuation of Bulletin No. 7, and is uniform with the third edition of that bul- 

 letin in type and illustrations. 



No. IS. — Studies on American Grasses: A synopsis of the Genus 

 Sitanion. By Jared G. Smith. Pp. 21, pis. 4. June 24, 1899. 



Twenty-two species of the genus Sitanion are here described. 



No. 19. — Structure of the Caryopsis of Grasses with Relation to 

 Their Morphological Classification. By P. B. Kennedy. Pp. 44, 

 pis. S. 1899. 



No. 20. — American Grasses, III. By F. Lamson-Scribner. Pp. 197, 

 figs. 136. 1900. 



This bulletin includes descriptions of the tribes and genera and a bibliog- 

 raphy of the works cited in American Grasses, I, II, and III. 



No. 21. — Studies on American Grasses. The native American spe- 

 cies of Chaetochloa. By F. Lamson-Scribner and Elmer D. Mer- 

 rill. Pp. 44, figs. 24. March 8, 1900. 



In this paper twenty-eight native American species are described, twenty- 

 three of which are natives of this continent. Six of these species are here pub- 

 lished for the first time. 



No. 22. — Cooperative Experiments with Grasses and Forage Plants. 

 By P. B. Kennedy. Pp. 86, pis. 13, fig. 1. 1900. 



In this bulletin the reports received from farmers and others to whom seeds 

 were sent for experimental i^urposes from the Division are presented. 



