first issued in 1897, has long been a favorite. 



Peattie, Donald C. 1953. A natural history of western trees. 

 Houghton Mifflin Co., Boston. All trees native to western 

 North America are included in this magnificent book. Each is 

 described historically, aesthetically, botanically, and geograph- 

 ically, and each is illustrated with a woodcut. A key to all 

 species and a glossary is given at the end of the book. 



Penalosa, Javier. 1963. A flora of the Tiburon peninsula, Marin 

 County, Cahfornia. Wasmann Journal of Biology, Volume 21, 

 Univ. San Francisco, San Francisco. A well-written account 

 and annotated checklist of the small but very interesting and 

 diversified fiora of the Tiburon peninsula. 



Peterson, P. Victor. 1966. Native trees of southern California. 

 Univ. Calif. Press, Berkeley and Los Angeles. Natural History 

 Guide Series. A guide to aid in the recognition of the native 

 trees only, with descriptions of the leaves, fruit, and flowers 

 where applicable. Includes distribution, interesting character- 

 istics, and a short general description. 



Peterson, P. Victor, and P. Victor Peterson, Jr. 1974. Native trees 

 of the Sierra Nevada. Univ. Calif. Press. Berkeley and Los 

 Angeles. Natural History Guide Series. A popular illustrated 

 guide to trees in the Sierra Nevada. 



Philbrick, R. N. 1972. Plants of Santa Barbara Island. Madrono, 

 Volume 21, California Botanical Society Inc., Berkeley. An 

 annotated list of the vascular plant flora with a discussion. 



Raven, Peter H. 1963. A flora of San Clemente Island, California. 

 Aliso, Volume 5, Rancho Santa Ana Botanic Garden, Clare- 

 mont. 



. 1966. Native shrubs of southern California. Univ. Calif. 



Press, Berkeley and Los Angeles. Natural History Guide Series. 

 A popular illustrated guide to native shrubs of southern Cali- 

 fornia. 



Rickett, H. W. 1970. Wild flowers of the United States. Volume 

 4: The southwestern states. McGraw-Hill, New York. Covers 

 about 3,000 species in New Mexico, Arizona, Nevada, and 

 southern California as far north as the Transverse Ranges and 

 the deserts to approximately the latitude of Mount Whitney. 

 Limited to herbaceous wildflowers, omitting those with 



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