52 University of California Piihlindions. [botany 



on slopes covered Ity sliniljs belonging to the chaparral l)elt, or 

 Sonorau Zone, but surrounded by coniferous forests. The 

 distributional notes will, it is hoped, prevent confusing these 

 with the truly montane species. 



The generic nomenclature is, with very few exceptions, that 

 of Engier & Prantl's Natiirlichen Pflanzenfamilien; for the 

 specific names adopted the wa-iter is alone responsible. No 

 attempt has been made to include an extensive synonomy, only 

 the more important synonyms being admitted. As a rule, 

 neither synonyms nor citations are given when they may l)e 

 readily found by consulting such standard works as the Synoptical 

 Flora'''^ or the Botany of California.! 



In the preparation of this catalogue the author is under 

 great obligations to Professor W. L. Jepson, of the University 

 of California, for valuable suggestions and continued help on 

 many difficult problems; to Mr. Joseph Burtt Davy, of the 

 same institution, for the determination of the Graminete and for 

 critical notes on certain species of this family; and to Mr. S. B. 

 Parish, of San Bernardino, whose knowledge of the Southern 

 California Flora has rendered his assistance of particular value. 

 It is a pleasure to also acknowledge the kindness of Dr. A. A. 

 Davidson, of Mrs. Katharine Brandegee, and of Miss Alice 

 Eastwood, in the loan of specimens for examination and in the 

 extension of other courtesies. 



CONIFERS. 



Abies concolor Lindley & Gordon, Journ. Hort. Soc. Lond. v. 

 210 (1850). A. concolor Loiciana Lemmox, West Am. Coneb. 

 ed. 3, 64 (1895). White Fir. 



The White Fir is the dominant tree of the Upper Transition 

 Zone, where it occurs in rather dense forests at 7000-8000 ft. 

 alt., and is also found scattered throughout the Lower Transition 

 on the one hand and in the lower part of the Canadian on the 

 other. (Seep. 23.) 



* Synoptical Flora of North America, l)y Asa Gray, eontimied liy B. L. Robinson, 

 Vol. i. pt. 1, fascicles 1, 2 (189.5-1897). Vol. i, pt. 2 (1886), and Vol. ii. pt. 1 (188«). 



t Geological Survey of California, Botany, by Asa Gray, W. H. Brewer, and 

 Serene Watson, 2 vols. (1880). 



