RYDBERG: PHYTOGEOGRAPHICAL NOTES 323 
2. PLANTS FOUND IN THE MAIN RANGE BUT NOT IN THE UINTAH- 
WASATCH REGION 
To this category belong nearly half of the endemic plants of 
the Southern Rockies. The list comprises 6 shrubs and 252 
herbs, but no trees. Some of these are restricted to the southern 
slope only and may be considered as immigrants from the Upper 
Sonoran region. Among these are three of the four fernworts 
endemic to the Southern Rockies: Cheilanthes Fendleri, Notholaena 
Fendleri, and Selaginella mutica. A fourth fern, Woodsia mexicana, 
is also found in the Black Hills and in sc cate and ranges 
southward into sicosac 
3. PLANTS RESTRICTED TO THE UINTAH-WASATCH REGION 
This category comprises 7 shrubs and 71 herbs, but no trees. 
Many of these plants are also found in the mountains of the Great 
Basin. Some of them, as Fendlerella utahensis, Chamaebatiaria 
_Millefolium, Arctostaphylos platyphylla, Phaca serpens, and Phaca 
Sileriana are evidently immigrants from the Upper Sonoran 
region. 
There are 47 local endemics found in Wyoming and south- 
eastern Idaho which occur nowhere else in the Rockies. Of these 
maybe one third should be counted as belonging to the southern 
Rockies. If so, the total number of endemics restricted to the 
southern Rockies would be about 560 species. 
C. PLANTS ENDEMIC TO THE NORTHERN ROCKIES ONLY 
I. PLANTS OF GENERAL DISTRIBUTION WITHIN THE NORTHERN 
ROCKIES 
aity one-third of the endemic species of the Northern Rockies 
are of general distribution and extend as far south as the Yellow- 
stone Park Region. Among these are included two trees, Picea 
albertiana and Betula utahensis, 4 shrubs and 102 herbs; altogether 
108 species. Of these the following extend south into the Uintah- 
Wasatch region. 
Juncus Tweedyi Delphinium bicolor 
Cardamine multifolia Aconitum divaricatum 
Ranunculus saxicola Draba andina 
