174 University of California Publications in Botany [Vol. 9 



Hooker and Gray's collection above cited as being of 8. Watsoni. 

 Dr. Jepson has pointed out how far recent collections have disclosed 

 points of agreement between these species, with the result that the 

 specific lines are now difficult to draw (Jepson, Fl. Calif., vol. 1, 

 pt. V, p. 511). To this same group Miss Eastwood allies her 8. lacus- 

 tris (Bot. Gaz,, vol. 41, p. 284. 1906), described from "Monarch Lake 

 near Mineral King, Tulare County, California, ' ' and stated to be most 

 nearly like S. Grayi: no authentic material of this species has been 

 seen by me. What is said by its author to be an outlying member of 

 this alliance, especially related to 8. Watsoni, is 8. ietonensis E. Nelson 

 (Bot. Gaz., vol. 30, p. 117. 1900) based upon collections from "high 

 grassy slopes of the Teton mountains," Wyoming, and also collected 

 on Dunraven Peak, Yellowstone Park; it is known to me only from 

 the description as published and maintained by Dr. A. Nelson in the 

 Coulter-Nelson manual. 



4. Silene Douglasii Hook., Fl. Bor. Am., vol. 1, p. 88. 1830. 



Type loQality. — "Abundant in mountain valleys, above the Grand 

 Rapids of the Columbia, and among the Rocky Mountains on their 

 western declivity." 



Range. — British Columbia south to the Tahoe region through the 

 Cascade-Sierra region ; eastward to Montana. 



Zone. — Transition and Canadian. 



8pecimens exandned. — Near Cisco, 1,890 m.. Hall 8742 ; south end 

 of Fallen Leaf Lake, Tahoe, 6,500 feet. Hall 8773 ; Grass Lake, 7,200 

 feet, McGregor 88 ; below Camp Agassiz, Tahoe, Dudley, June 27, 

 1900. 



Wliile typical 8. Douglasii is not usually considered as reaching 

 the Sierra, all collections being as a rule referred to the var. ynonantha, 

 the characters of the specimens above cited seem to require the dis- 

 position here given them, at least as to the sheets of these numbers 

 seen by me. 



4a. Silene Douglasii var. monantha (Wats.) Robinson-, Proc. Am. 

 Acad., vol. 28, p. 145. 1893. 

 S. monantJui Wats., Proc. Am. Acad., vol. 10, p. 340, 1875. 



Type locality. — "On the debris at the base of Castle Rock, Cas- 

 cades, ' ' Washington. 



Range. — AVashington south to the Tahoe region. 

 Zone. — Canadian ? 



