160 NORTH AMERICAN FAL'XA. [no. 16. 



handsome scarlet flowers are very attractive. On warm southwest 

 slopes near Panther Creek it was found as high as 0,G00 feet, and 

 between Mud and Clear creeks as high as (5, 700 feet, but these are 

 abnormal altitudes due to unusually warm exposures and soil. 



Collomia grandiflora Dougl. 



Common in the upper part of the Transition zone a little below Wagou 

 Camp, where it was tiowerinu' al)undantly tlie last half of July. 



Phlox douglasi diffusa (P>enth.) (iray. Alpine Pldox. 



A common, widely distributed, and conspicuous ])lant of the higher 

 slopes within the ITudsonian zone, sometimes straggling down into the 

 Canadian zone. It occurs in scattered tufts on the dry rocky slopes 

 and ridges, usually on pumice soil, and is commonest in the neighbor- 

 hood of timberline. It blossoms early, and flowers were rarely seeu 

 as late as the latter part of July. After flowering the whole plant 

 withers and is disintegrated by the wind, so that little more than the 

 woody base remains. 



Polemonium pulchellum liunge. 



A characteristic but not abundant Alpine species, occurring here 

 and there among rocks far above timberline. On the north side of 

 Shastina it was in full bloom July 24 at an altitude of 8,900 feet. On 

 the south side of Shasta, above Squaw Creek, and on both sides of 

 Mud Creek Canyon, it was not found below 9,500 feet, whence it ranges 

 up to 13,000 feet. This species and Draha hrefccri were both observed 

 at 13,000 feet, and are the highest plants found on Shasta. (Identified 

 by Professor Greene.) 



Phacelia frigida Greene.' Dwarf Alpine Phacelia. 



This new si)ecies, which Professor Greene has kindly described at 

 my recpiest from specimens collected by us above the head of S(|uaw 

 Creek, is common and widely distributed on the higher and more bar- 

 ren rocky slopes, beginning above timberline and reaching, on south- 

 erly sloi)es, as high at least as 10,200 feet. The lowest altitude at 

 which it was found is 8,700 feet, on a cold slope. 



Phacelia magellanica (Lam.) Coville. 



A i)lant whicli, in the present unsatisfactory state of the group, it 

 seems necessary to refer here, is abundant on the lower slojx's, j)ar- 

 ti<;ularly in the Transition zone, where it was in Mower tliroughout the 

 summer and jis late as the end of September. 



Cryptanthe geminata (ireene. 



Kather common in the Transition /one below Wagon Camp, (identi- 

 fied by Professor Greene.) 



1 I'ittonia. I\', ])p. :«t-10, MmkIi 17, \> 



