FLORA OF THE SAN ANTONIO MOUNTAINS 77 



north side. This list includes, — Primus demissa, Fremontia cali- 

 fomica, Gay ophy turn caesium, Castilleja miniata, and Chrysotha- 

 mus nauseosus. The south side of the mountain is strikingly 

 lacking in plants which are peculiar to it. 



The Canadian Zone, in the San Antonio Mountains, is charac- 

 terized by Pinus Murrayana and Draba corrugata. It includes 

 most of the mountain above 8000 feet altitude, embracing an 

 area of about ten square miles. The largest part of the zone 

 consists of bare exposed ridges, but there are, in a few scattered 

 spots, small protected areas which bear a Canadian Zone flora. 

 No water is found within the Canadian Zone and hence the flora 

 is somewhat limited. 



Plants restricted to the Canadian Zone 



Pinus Murrayana Ribes montigenum 



Carex abrupta Heuchera Abramsii 



Calyptridium Parryi Galium multiflorum parvifolium 



Arenaria Nuttallii gracilis ' Erigeron jacinteus 



Draba corrugata Crepis nana 



Since the flora of the summit of Mt. San Antonio may be of 

 interest the following list is given, which includes those plants 

 growing between 10,000 and 10,080 ft. altitude, or those grow- 

 ing within about fifty yards of the summit cairn. 



Summit flora of Mt. San Antonio (10,000-10,080 ft.) 



Pinus Murrayana Draba corrugata 



Sitanion minus Heuchera Abramsii 



Carex abrupta Ribes montigenum 



Carex brevipes Ribes cereum 



Allium Br ewer i Sericotheca concolor 



Castanopsis sempervirens Viola purpurea pinetorum 



Eriogonum umbellatum minus Drudeophytum vestitum 



Eriogonum saxatile Gilia pungens tenuiloba 



Arabis platysperma Collinsia Torreyi Wrightii 



Galium multiflorum parvifolium 



CATALOGUE OF THE VASCULAR FLORA OF THE PINE BELT 



The following catalogue is founded mainly on collections made 

 by the author. A number of species have been collected in the 

 San Antonio Mountains by others which the writer failed to dis- 

 cover. In such cases, if the specimen was seen, the record was 



