December 31, 1906 1H7 



BETULACEAE 



Betula occidentalis Hook. Fl. Bor. Am. 2: 155. 1839. 



No. 8266, collected May 16, in Silver canyon in the White 

 mountains opposite Laws, Inyo county, at about 5500 feet ele- 

 vation, on the banks of a small stream. It also occurs along 

 streams in the Sierra foothills west of Bishop in granite forma- 

 tion. It is a small slender tree not over fifteen or twenty feet 

 high, usually smaller, with yellowish bark. The original came 

 from the "Straits of De Fuca." 



POLYGON ACE AP: 



Chorizanthe pungens Benth. Trans. Linn. Soc. 17: 419.//. 

 /p. 1837. 

 No. 8283, collected June 8, in sandy soil near the Ocean 

 Shore railroad tracks in San Mateo county, beyond Ocean View, 

 San Francisco. The scarious margins of the involucre are pres- 

 ent but less prominent than in specimens from Monterey, where 

 the species is very abundant. 



Centrostegia thurberi Gray, Pac. R. R. Rep. 7: 20. 1856. 



Chorizanthe Thurberi Wats. Proc. Am. Acad. 12: 269. 

 1876. 



No. 8206, collected May 8, on the edge of the sand hills 

 three miles west of Laws, Inyo county, where it is plentiful in 

 fine granite sand. The type was collected "on sandy hill-sides 

 near San Felipe," San Diego coimty. 



OXYTHECA PERFOUATA T. & G. Proc. Am. Acad. 8: 191. 

 1870. 

 No. 8305, collected May 22, in the valley between Laws 

 and Silver canyon, Inyo county. It is plentiful in the vicinity, 

 sometimes growing in colonies and sometimes as individuals. 

 The type was from "Nexada, Fremont, second Expedition." 



