XXXviii BOTANY. 



canons of the Uintas B. glandulosa and Vaccinium Myrtillus. The timber 

 trees, which are found from the middle canons to an altitude of about 10,000 

 feet, consist of Firms Jlexilis and ponclerosa, and the smaller contorta, with 

 Abies Menziesii, Engelmanni and Douglasii, grandis and amabilis. Juniperus 

 occidentalis is replaced by J. Virginiana. In some of the canons the cottonwood 

 attains a large size, but the oak, which is frequent through the Wahsatch, 

 and maple are rarely large enough to become of value. The rvalleys of 

 Bear River and the Weber have a flora resembling that of the higher valleys 

 of the Basin, with Artemisia, &c., but in the still higher parks the vegetation 

 is principally herbaceous and very various. 



As shown by the subdivisions of the following list of the plants collected 

 only in these mountains, thirty-two species are either new or not yet found 

 elsewhere ; twelve occur in the Pacific ranges, seventy in the Rocky 

 Mountain region, and forty -two others in both mountain systems, only twenty 

 of the whole extending eastward towards the Saskatchewan or Mississippi. 

 Of these western species seventeen are arctic and twelve subarctic, to twenty- 

 eight alpine and twenty-two subalpine. In division (c.) are forty-two species 

 which are found on both the Pacific and Atlantic slopes, and twenty-six be- 

 longing to the Atlantic side only ; of these twenty-six are arctic and fifteen 

 subarctic, to six alpine and seven subalpine. If, however, the entire collection 

 from these mountains be taken into account, division (a.) will include 57 

 species, the three sections of division (b.) 61, 120 and 194 species re- 

 spectively, and the sections of division (c.) 151 and 35 species. While the 

 proportion of arctic and subarctic plants remains the same (but with a dispro- 

 portionate increase among the more widely diffused species,) that of Mexico 

 and southern species becomes one-half greater. The whole number of alpine 

 species will be seventy-nine and of subalpine sixty-eight. 



species collected only in the Wahsatch and Uintas. 



('^■) Orogenialinearifolia. Castilleia flava. Val. 



Parrya macrocarpa. Alp. Arc. Cymopterus longipes. Gllia stenothyrsa. 



Caulanthus hastatus. Angelica pinnata. tenerrima. Val. 



Lychnis Ajanensis ? Alp. Sib. Peucedanum simplex. S. Gentiana heterosepala. 



Sagina nivalis ? Alp. Gr. bicolor. Polygonum minimum. Alp. 



Lewisia brachycalyx. S. • Lonioera Utahensis. Allium brevistylum. 



LinumKingii. Subalp.* Aster Kingii. Carex elongata. Subalp. Subarc. 



Lupinus parviflorus. Erigeronursinum. Subalp. vulgaris, var. Subalp.* 



Trifolium Kingii. stenophyllum. Subalp. PoaEatoni. 



Andinum. Tanacetum diversifolium. (^'^ 



gymnocarpon. Taraxacum phymatocarpum. Alp. Gr. Saxifraga integrifolia. 



Astragalus jejunus. Val. Synthyris pinniatifida. Zauschneria Galifornica. Mex. 



