782 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



Salix glauca, L. — Swamp on Henry's Fork of Snake Eiver, August ; 

 Upper Canon of the Madison. 



Salioc glauca, L., var. pullata, Anders. — Upper T6ton Canon, July; 

 Eed Mountain, Wyoming, September. 



JSalix arctica, E. Br. — Snake Eiver Valley, August ; T6ton Mountains, 

 elevation 12,000 feet, July. 



Salix arctica, E. Br., var. Brownii, Anders. — Teton Mountains, eleva- 

 tion 12,000 feet, July. 



Salix reticulata, L. — Teton Mountains, elevation 12,000 feet, July ; 

 mountains near Ogden, Utah, elevation 10,000 feet, June. 



Populus tremuloidss, Michx. — Teton foot-hills. Common everywhere 

 in the West on foot-hills and following the courses of streams. It is 

 known as "quaking asp." 



Populus halsamifera, L., var. angustifolia, S. Watson, (P. angustifolia,) 

 James. — Along the streams of the Teton Basin, July 22; common every- 

 where in the Northwest, in the lower altitudes ; kuown as " bitter Cot- 

 tonwood." 



CONIFERS. 



Pinlis contorta, Dougl. — Henry's Lake, Idaho, on mountains, Au- 

 gust 5. 



Pinus contorta, Dougl., var. latifolia, Eugelm. (Bed Pine.) — Mount- 

 aius along Henry's Fork of Snake Eiver, August 5; Lower Fire-Hole 

 Basin, August. 



Pinus ponderosa, Dougl. {Yellow Pine.) — T6ton Eange, elevation 

 6-8,000 feel, July 22. 



Pinus flexilis, James. — Mountains near Henry's Lake, August 9 ; 

 Teton Mountains, elevation 7-11,000 feet, July 24. 



AMes Engelmanni, Parry. ( White Pine.) — Teton Mountains, elevation 

 7-9,000 feet, July 24. 



Abies 3ien.ziesii, Lindl. {Balsam.) — Grand Canon of the Yellowstone, 

 elevation 7-8,000 feet, August 22. 



Abies amabilis, Forbes-C?)— Teton Eange, elevation 8-10,000 feet, 

 July 26. 



Abies grandis, Lindl. ( White Spruce.) — Mountains near Ogden, Utah, 

 elevation 7-9,000, June 13; Trail Eiver Mountains, Wyoming, ele- 

 vation 6-9,000 feet, September 13. 



Abies Douglasii, Lindl. {Swamp Pine.) — Mountains near Ogden, Utah, 

 elevation 7-9,000 feet, June 8 ; Teton Mountains, elevation 7-10,000 

 feet, July 24. 



Juniperus communis, L., var. alpina, L. — Mountains near Ogden, Utah, 

 June 11, elevation 9-10,000 feet; Lower Fire-Hole Basin, August. 



Juniperus Yirginiana, L. {Bed Cedar.) — Mountains along Henry's 

 Fork of Snake River, 6-7,000 feet altitude. 



Juniperus occidentaUs, Hook. — Mountains near Ogden. Utah, elevation 

 5-7,000 feet, June 8; Teton Mountains, el-evation 7-10,000 feet, July 24. 



LEMNACE^. 



Lemna trisulca, L. — Common in the waters of Henry's Fork of Snake 

 Eiver, August ; • it also occurs in great abundance upon the small 

 streams in the two Geyser Basins. 



Lemna polyrrhiza, L. — In the waters of Henry's Fork of Snake Eiver, 

 August ; Jackson's Lake, September. 



