498 IOWA ACADEMY OF SCIENCE 



Douglas Fir (Pseudolsuga mucronata Suclw.). The Douglas 

 fir is widely distributed in California from Porto-la to Beldetn 

 in the Feather river canon, Santa Cruz mountains, Big Trees 

 and Sierra Madre. 



"White Fir (Abies concolor Lindl. and Gord.). Common in. 

 the Feather river canyon between Portola and Bel den. A large 

 tree with smooth bark. 



Redwood (Sequoia scmpervirens Endl.). Isolated groves are 

 found in the vicinity of San Francisco, Muir Valley, Santa 

 Cruz mountains, Big Trees. The Muir woods contain some fine 

 trees. The Sequoia in the Santa Cruz mountains is associated 

 with the beautiful Chamisso's fern (Aspidium minutum), Um- 

 bellularia calif ornica, Quercus chrysolepsis, Acer macrophyllum 

 and Alnus rhombifolia. On some of the stumps of the redwood 

 three generations may be seen. Unlike the pines this species 

 sprouts abundantly and reproduction is plentiful in the canyons 

 and moist slopes. 



Incense Cedar (Libocedrus decurrens Torr.). The tree re- 

 sembles an arbor vitae with minute leaves. It is abundant on 

 the mountain slopes associated with the white fir, Douglas fir 

 yellow pine and Purshia tridentata. This is true for Feather 

 river canyon about Portola. It was common between Portola 

 and Belden, also near San Bernardino in the mountains of that 

 name and at the summer resort known as Skylands. 



Monterey Cypress (Cupressus macrocarpa Hartw.) is com- 

 monly planted in California. It occus on the ocean shore at 

 Monterey from Pescadero Point to Cypress Point, a strip about 

 two miles long and one-eighth of a mile wide. There is also a 

 little grove at Point Lobos. 



Gowen Cypress (Cupressus goveniana) occurs on the coast on 

 the west slope of Huckleberry Hill. 



California Juniper (Juniperus calif ornica Carr). The Cal- 

 ifornia juniper is a low tree, often a shrub, found at lower alti- 

 tudes of the San Bernardino mountains, where it is common. 



Western Juniper (Juniperus occidcntalis Hook.). Not common 

 in the Feather river country. Near Portola a few isolated trees 

 were found. 



