134 
AMERICAN JOURNAL OF BOTANY 
[Vol. 8 
1903 Greene A peculiar type of Toxicodendron belonging exclusively to the 
Pacific Coast. 
1903 Jepson Along fences in Vacaville. 
Vacaville to Twin Sister's Peak. Vacaville Rock Peak. 
1906 Piper Washington to California in the coast regions. Humid 
transition zone. 
1907 Jepson Cudahay Trail to Dutch Henry's on Klamath River, 2,500- 
4,000 feet, below fir zone, only along river. 
1909 Parsons Throughout California, save in the high Sierras. 
1909 Jepson Pepperwood, Humboldt County, in redwood trees. 
Hetch Hetchy (3,700 feet). 
1910 Jepson Belden, 2,000 (approximate) feet. 
Half Moon Bay. 
191 1 Jepson Arroyo Seco, Monterey County, altitude 100-500 feet. 
Napa Range near Atlas Peak. 
191 1 Abrams Frequent in chaparral belt throughout southern California. 
191 1 Muir Common throughout the foothill region up to a height of at 
least 3,000 feet above sea level. 
191 1 Jepson Found in Coast Range and foothills of the Sierra Nevada, 
widely distributed and often abundant. 
1912 Hall Confined to lower end of Yosemite Valley, and to the Hetch 
Hetchy and low foothills. 
1912 Jepson Nelson, middle Tule River, altitude 4,760 feet. 
Saratoga, Santa Clara County, altitude 600 feet. 
1916 Hall Merced Canyon, not rare to 3,200 feet altitude. West of 
Wawona at 4,500 feet. Small. 
In Santa Cruz Mountains, dominant shrub Alma to summit, 
especially in redwood belt. 
1916 Sanborn Abundant in the hills about Eugene, and all through the 
western part of Oregon. 
1916 Crawford In mountain canyons and valleys from sea level to about 
7,000-7,500 feet elevation. 
Very common throughout Pomona Valley and all the valley 
regions between San Bernardino and the coast. 
19 1 6 Parish Grows to some extent in damp soil in San Bernardino Valley, 
altitude 1,000 feet, and abundantly in the canyons of the 
southern slope of the San Bernardino Mountains up to 
3,500 feet altitude at least. Does not grow in the higher 
mountains nor in either the Mojave or the Colorado Desert. 
1919 Jepson Dunsmuir to Castle Rock Station along Sacramento River, 
2,200 feet altitude. 
Locations where Birds which had eaten Rhus diversiloba Fruit were Collected 
CALIFORNIA 
Alhambra Pinte Mountains 
Arroyo Valley Creek Rio Dell, 15 miles southwest 
Berkeley San Antonio Canyon 
Berryessa San Fernando 
Camp Meeker San Jose 
Chico, Tehama County Santa Clara County 
Claremont Santa Monica Mountains 
Cull Canyon Santa Rosa 
Guadalupe Sierra Morena, 6 miles 
