212 



Var. robiistior, Kunth, Enum., ii., p. 88. Spikelets large, 

 elongated. lO to 25 -flowered. With the type. 



Var. capitatns, Boeckl, Liniiaea, xxxvi., p. 347. Inflores- 

 cence of several capitate clusters, rays short. Indiana (Dr. 

 Clapp, 1838); St. Louis, Mo., (Engelmann) ; Illinois (Dr. 

 Schneck); Massachusetts (Morong) ; Camden, N. J., (Martin- 

 dale) ; Texas, (Bigelow.) 



Var. COMPOSITUS, n. var. {C. strigosus, var. Torrey, Ann. 

 Lye, iii., p. 262.) Umbel compound ; spikelets one-third to 

 one-half inch long, 4 to 5 -flowered. Astoria, Long Island 

 (Leggett) ; Pennsylvania and New Jersey to Alabama. 



Var. GRACILIS, n. var. Slender, leaves shorter than the 

 culm, umbel of 1-3 short rays, bearing few, linear, spreading 

 spikelets. Valley of the Lower Rio Grande (Buckley) ; Fayette- 

 ville. Ark., (Harvey.) 



Var. ELONGATUS. {C. Michauxianus, var. {}) elongatus, Tor- 

 rey, Ann. Lye, iii., p. 432 (?). Rays much elongated, bearing 

 single, capitate clusters. North Carolina (Curtis, in Torrey 

 Herb.) The originals of Dr. Torrey 's variety were collected by 

 Drummond in Texas, but there are no specimens from there in 

 his herbarium, and I have no means of knowing if they are the 

 same as the one from North Carolina on which the present variety 

 is based. 



43. C. stenolepis, Torrey. North Carolina to Florida and 

 Texas. 



44. C. setigerus, T<yrr. and Hook. (Including C. Intescens, 

 Torrey, Bot. Mex. Bound. Survey, p. 227, and Herbarium.) 

 Texas and New Mexico (C. Wright, No. 705 ; Buckley ; Bigelow, 

 and Herb. Berland. Texano-Mexicanum, Nos. 2410 and 980.) 

 I can see no reason for keeping the two species separate, and Dr. 

 Torrey states (1. c.) that his C. Intescens is probably too close to 

 C. setigerus. 



45. C. sp/iacelatus, Rottb. Southern Nevada (Lieut. 

 Wheeler, 1871, in Gray Herbarium); Cal. (Parish); ballast, 

 Mobile, Ala., (Mohr.) ; the specimens almost exactly match the 

 others from St. Thomas, W. I. (Eggers), and No. 636, Sagot, 

 Guyane Francaise. Resembles the last, but the glumes are 

 brown-margined. 



