30 POACEAE. 



Saguache Creek; Fort Collins; Denver; Durango; vicinity of Boulder; Gun- 

 nison; Cottoinvood Creek; Manitou; Grand Junction. 



8. Sporobolus confusus Vasey. (S. ramulosus of Coult. Man.; not Kunth.) 

 In wet, sandy places from Neb. to Mont., Tex. and Ariz. ; also in Mex. — Alt. 

 4000-8500 ft.— Colorado Springs; Saguache Creek; Cimarron; Minnehaha; 

 Ouray; Gunnison; Piedra; Buena Vista; mountains of Larimer Co.; Twin 

 Lakes; Alamosa; vicinity of Fort Collins; Table Rock. 



27. POLYPOGON Desf. Be.\rd-grass. 



I. Polypogon monspeliensis (L.) Desf. In waste places from N. H. to 

 B. C, S. C. and Calif. — Alt. about 5000 ft. — Fort Collins; Poudre River. 



28. CINNA L. Wood Reed-grass. 



I. Cinna latifolia (Trev.) Griseb. (C. pendula Trin.) In damp woods 

 from Newf. to B. C, N. C. and Utah.— Alt. 4000-7500 ft. — Empire; Buffalo 

 Pass road, Routt Co. ; Idaho Springs ; Salida. 



29. AGROSTIS L. Red-top, Herd-grass, Tiorin, Bent-grass, Hair-grass, 



Tickle-grass. 



Palet conspicuous, at least one-third as long as the flowering glume. 



Panicle large; branches verticillate ; spikelets about 3 mm. long; stem 3-10 



dm. high. i- ^- alba. 



Panicle small and narrow ; branches scattered or in pairs ; spikelets about 2 

 mm. long; stem 0.6-3 dm. high. 2. A. depressa. 



Palet minute or wanting. 



Branches of the contracted panicle short, at least some of them spikelet-bearing 

 to the base. 3- A. asperifolia. 



Branches of the panicle more slender, naked below. 



Flowering glume awnless or short-awned ; the awn not exceeding the spike- 

 let. 

 Branches of the panicle filiform, branched far above the middle, at last 

 divaricate or reflexed ; plant usually over 3 dm. high. 



4. A. hiemalis. 

 Branches short, 1-3 cm. long, ascending; plant 1-3 dm. high. 



5. A. tenuiculmis. 

 Flowering glume with a long, bent awn, which exceeds the spikelet by one- 

 half. 6. A. canina L. 



1. Agrostis alba L. In wet meadows from Newf. to B. C, Fla. and Calif.; 

 native also of Europe and cultivated.— Alt. 4000-8500 ft.— Gunnison ; Golden; 

 Fort Collins; Engelmann Canon; Georgetown; Ouray; Twin Lakes; Mani- 

 tou ; gulch west of Soldier Cafion ; Baxter's ranch. 



2. Agrostis depressa Vasey. In wet mountain meadows and along brooks 

 from Wyo. to Utah and Colo.— Alt. 9000-11,000 ft.— Georgetown ; Beaver 

 Creek. 



3. Agrostis asperifolia Trin. {A. exarata Coulter, in part) In wet mead- 

 ows from Man. to N. M. and Calif.— Alt. 4000-10,500 ft.— Beaver Creek; 

 near Pagosa Peak; Arboles; along the Lower Cucharas River; Twin Lakes; 

 Fort Collins; gulch west of Soldier Caiion. 



