54 



f 



0. UTEicuLATA, Boott. Twiu Lakes. (10G9.) There are several num- 

 bers of the Veskarice group without ripe achenia, and hence unnam- 

 able. 



C. SAXATiLis, L. = C. PULLA, Good. Twiu Lakes. 



C. SAXATILIS, L, r= C. PULLA, Good. These differ slightly, the last with 

 a more inflated perigynium ; achenia of both nearly the samej both 

 have two stigmas tnost generally. The perigynia of both have few nerves, 

 and are so described by Lang and other European authors. 1070. 



C. Grahami, Boott., inTr. Liun.Soc. (1071;) also, 1072. Both, asusual, 



without ripe achenia. The last has ovate perigynia rouuded at the 

 base. 



Dkteiimlxed by De. Geo. Vasey. 



Alopecurus akistulatus, Michx. In ponds, Twiu Lakes, Colorado. 

 A form with debcate floating leaves; awn much shorter than the palet. 

 (1073.) There are also other forms stouter, and with the awn one- 

 half longer than the palet. 



Phleum ALriis'UM, L. Twin Lakes and South Park. (1074.) 



ViLFA cuspiDATA, Torr. Dry ground. Twin Lakes. (1075.) 



V. DEPAUPEEATA, Torr.(1) South Park. (107G.) 



V. MINIMA, 71. »p. Culms erect, branched at the base, slender ; spikes 

 terminal and lateral, simple, few-flowered ; lateral ones partly included 

 in the sheaths; flowers alternate, half a line long, pointed ; glumes 

 membranaceous, obtuse, about half as long as the flowers; palets 

 nearly equal in length ; leaves mostly radical, short (4 to | inch), 

 strongly nerved, lower sheaths inflated. This diminutive grass ap- 

 pears to be annual, is from 1 to 1^ inches high, slender and delicate, 

 and was found growing on wet shores around Twiu Lakes, Colorado. 

 (1077.) 



Sporobolus crypt a>'drus, Gr. Eaviues in Arkansas Talley. (107S.) 

 S. AiEoiDES, Torr. Cottonwood Creek, Colorado. (1079.) 

 S. EAMULOSUS, H. B. K. Saguache Creek, Colorado. (1080.) 

 S, ASPERiFOLius, N. & U. Cottonwood Creek, Colorado. (1081.) A 

 very luxuriant form occurs, in which many of the specimens have 2-3- 

 flowered- spike! ets. Many of these have the grain aft'ected with a 

 black smut. In a bog, Saguache Creek. (1082.) 

 Agrostis scabra, Willd. Low ground. Twin Lakes, Colorado. (1083.) 



Dry beds of brooks. South Park. (1081.) 

 A. PERENNANS(?), Tuck. Wet ground among timber. (1085.) 

 A. EXARATA, Trin. (?) A small form. Twiu Lakes. (1086.) 

 A. VULGARIS, With. Introduced(?). Roadsides. Twin Lakes. (1087.) 

 MuHLENBERGiA PUNGENS, Thurb. Fort Garland. (1088 ) 

 M. GRACILIS, Trin. Twiu Lakes. (1089.) 



M. GRACILIS, var. breviaristata. Shorter and smaller, in more com- 

 pact tufts ; awns hardly half as long. Twin Lakes. (1090 ) 

 M. GRACiLLiMA, Torr. San Luis Valley. (1091.) 

 Vaseya comata, Thurb. Gravelly shores, Twiu Lakes. (1092.) 

 Calamagrostis Langsdorffii, Trin. Wet ground. Twin Lakes. (1093.) 

 O. SYLvatica, DC. Dry ground, Mosquito. (1094.) Also South Park. 

 (1095.) 



C. steicta, Trin. Twiu Lakes (1096); and Saguache Creek (1097). 

 Used for hay-makiag. 



i 



