209 



25- C. serrulatus, Watson. Placer Co., Cal., G. R. Vasey ; 

 Alta, Cal., Pringle ; Sacramento, M. E. Jones, Flor. Cal., 3530. 



26. C.reflexns,V-a\\\. (C r;//^j-<:^;w, Torr. and Hook.) Texas, 

 (Drummond ; E. Hall, No. 679, in part ; Wright ; Nealley.) 

 Specimens recently received from Mr. Nealley show that the 

 scales are not always red, and that the spikelets may be as many 

 as 30-flowered. 



27. C. cyrtolepis, Torn and Hook. Texas Drummond, 

 Wright, Mex. Bound. Survey, No. 1520, E. Hall, 678 in part, 

 Buckley, Reverchon) ; Camp Grant, Arizona, (Rothrock, Exp. 

 and Surv. W. of looth Merid., 390); Indian Terr., (Palmer 351.) 



Var. DENTICARINATUS. {C. rufesce7is, var. denticarinatns, 

 Pritton in Bull. Torn Bot. Club, xi., p. 85.) After a re-examin- 

 ation of Mr. Buckley's specimens from the valley of the lower 

 Rio Grande, I am convinced that they belong rather to this 

 species than to C. ricfescens. 



28. C. acumijiatus, Torr. and Hook. Illinois and Tennes- 

 see to Louisiana, Kansas and Arizona ; also collected by Howell 

 (No. 567) along the Columbia River in Oregon, and by J. W. 

 Congdon in Tulare Co., Cal. A form of this species collected by 

 E. Hall at Hempstead, Texas (PI. Tex., 679), has dense heads of 

 many spikelets. 



Section 5. Haspani, Kunth. 



29. C. Haspan, L. Virginia, North Carolina (Curtis, Can- 

 by), to Florida (Curtiss, N. A. Plants, No. 3041), and westward 

 to Texas (E. Hall, No. 683) ; also occurring in Mexico, the West 

 Indies, South America, Africa, Asia and Australia. 



30. C. dentatus, Torrey. Cumberland Co., Maine (J. Blake), 

 Rhode Island and northern Nev/ York (Leggett), to South Caro- 

 lina, mainly near the Atlantic coast, but extending westward to 

 West Virginia (Mertz.) 



31. C. Lecontei, Torrey. Florida (Curtiss, N. A. Plants, 

 No. 3045) to Louisiana. 



Section 6. Fiisci, Kunth. 



32. C. laterifloriis, Torrey. East of Santa Cruz, Sonora, 

 (C. Wright, No. 1950.) Not since collected. The species is 

 nearly allied to C. difformis, L., of the tropical regions of the 

 Old World, and may be the same. 



