CALIFORNIA FOREST FLORA 499 



SALICACE& Willow Family. 



Yellow Willow (Salix lasiandra Benth.). This willow is com- 

 mon along streams, Feather river canyon, Portola and Belden. 



Black Willow (Salix nigra Marsh.)- Along streams, Yuba, 

 Feather river and in the "Great Valley." 



Arroya Willow (Salix lasiolepis Benth.). This is common 

 in the bottom of streams in southern California. San Diego. 



Nuttal Willow (Salix flavescens Nutt.). Along the sea coast, 

 San Francisco Bay region. 



Cottonwood (Populus Fremontii Wats.). This is common 

 along the streams in the Great Valley, Yuba City, southern 

 California, San Diego. 



Black Cottonwood (Populus trichocarpa T. and G.) is a beau- 

 tiful tree resembling the balm of Gilead. It is common in the 

 Feather river canyon near Belden, growing in the bottoms. 



JUGLANDACE^E Walnut Family. 



California Walnut (Juglans calif omica Wats.). The Cali- 

 fornia walnut is common in the lower parts of the canyons of 

 the San Bernardino mountains. It is a low branching tree. 

 Trees occur in the great northern valley of California. The 

 wood of this species makes beautiful lumber. This form has 

 been called the var. Ilindsii by Jepson. 



BETTJLACE2E Birch Family. 



White Alder (Alnus rJiombifolia Nutt,). Common every- 

 where in the lower Sierras. Abundant along the Feather river 

 m the canyon near Belden, Muir woods and Mill valley, Santa 

 Cruz Mountains, San Lorenzo canyon, Big Trees, mountains 

 near Los Angeles, and the canyons of San Bernardino moun- 

 tains. 



FAGACEM Oak Family. 



Valley Oak (Quercus lobata Nee). The valley oak is one of 

 the most striking trees of the "Great Valley," Sacramento, 

 Marysville, Yuba City, Live Oak, etc. Large trees are found 

 about Yuba City. The trees of the Valley Oak are sometimes^ 

 eight to ten feet in diameter. The crown is round topped and 

 has pendulous branches. 



