GEOLOGICAL SURVEY OF THE TERRITORIES. 787 



Festuca ■microstacJii/s, JSTutt. — Plains near Ogden, Utah, June. 



Bromus hreviaristatus, Thurber, (?) {Geratochloa, Hook.) — Marsh Val- 

 ley, Idaho, June; Teton Basin, July. 



Bromus ciliatus, L. — Upper Gafion of the Madison, August. 



Phragmites communis, L. — Port Xeuf Valley, Idaho, July. 



Triticion repens, L. — Poit Neuf (Jaiion, Idaho, Julyj Snake Eiver 

 Valley. It is known as "blue-joint," and is valuable for hay and g'raz- 

 ing. Found also in the Upper Geyser Basin, August. 



Tritkum caninum, L. — Upper Geyser Basin, August. 



Trlticwn strigosiim, Steud., {Bromus, Bieb., T. cegilopoides, Turcz.) — 

 Teton Basin, July. 



Triticum glaucum, Desf. (?) — Port Xeuf Valley, Idaho, July; Snake 

 Kiver Valley. 



Rordeum pusillum, Xutt. — Marsh Valley, Idaho, July ; Snake Eiver 

 Valle^^; Teton foothills, August. 



• Sordeum juMtum, L. — Ogdeu Caiion, Utah, June ; Snake Eiver Val- 

 ley, July. 



Rordeum juhatum, L. var. — Peculiar to the Upper Geyser Basin. 



Elymus mollis, Triu. — Henry's Fork of Snake River, July. 



Elymus condensatus, Presl. — Fort Hall, Idaho, July; Teton Basin; 

 Snake Eiver Valley; Blackfoot Eiver. 



Rlymus Sitanion, Schult., (Sitanion elymoides, Eaf., and Polyantherix 

 Rystrix, Xees.) — Great Salt Lake, Utah, June; Henry's Lake, Idaho, 

 August; Lowe»r Geyser Basin, Sei)tember. 



Elymus SiMricus, L. — Henry's Fork of Snake Eiver, July; Upper 

 Geyser Basin, August. 



JDanthonia Galifornica, Boland. — Henry's Fork of Snake Eiver, July; 

 Teton foot-hills, August. 



Trisetum suhspicatum, Beaud. — Trail Eiver Mountains, elevation 

 10,000 feet, September, 



Trisetum suhspicatum, Beaud., var. muUcum. — Teton Caiion, July. 



Trisetum suhspicatuyn, Beaud., var. vnoi/e, Uintah Mountains, Wyoming, 

 August, 1872. I)r. Joseph Leidy. 



Airafiexuosa, L. — Hot springs ten miles from Ogden, Utah, June. 



Aira ccespitosa, L. — Fire-Hole Eiver, August. 



Phalaris arundinacea, L. — Marsh Valley, Idaho, June ; Snake Eiver 

 Valley, July; Upper Caiion of the Madison, August. "Known as 

 'crazj' grass,' from its reputed injurious effect upon horses." Watson. 



Panicum capillare, L.— Yellowstone Lake, August; very common in 

 both Geyser Basins. 



EQUISETAOEiE. 



Equisetum arvense, L. — Ogden Cafion, Utah, June. 

 Equisettim hyemale, L. — Henry's Fork of Snake Eiver, July. 

 Equisetum pratense, Elir. — Henry's Fork of Snake Eiver, July. 

 Equisetum variegatum, Schleicher. — Lower Fire-Hole Basin, August.* 

 Equisetum scirpoides, Michx. — Snake Eiver Valley, July. 



PILICES. 



Pteris aquilina, L. — Shoshone Lake, September ; Upper Geyser 

 Basin, August. 



Pellcea Breiveri, D. C. Eaton. — Mountains near' Ogdeu, Utah, June; 

 Teton Eange, July. 



Pellwa densa, Hook. — Jackson's Lake, September 23. 



