White Alder (Alnus rhombifolia) is a member of the Birch family (Betulaceae) native to western North America, from Washington east to western Montana and south to San Diego County, occurring at altitudes of 300-7900 feet.

2020年1月31日 · The white alder, Alnus rhombifolia, also called the California alder, is an inland tree of the Cascade and Sierra Nevada mountain ranges, closely related to but not often overlapping its more coastal cousin, the red alder (Alnus rubra). It sports dark green, glossy leaves with finely toothed edges that are lighter green underneath.

Alnus rhombifolia, the white alder, is an alder tree native to western North America, from British Columbia and Washington east to western Montana, southeast to the Sierra Nevada, and south through the Peninsular Ranges and Colorado Desert oases in Southern California. [2]

White alder is native to the western United States; it is the most common alder in the mediterranean region of the West. It is distributed from San Diego County, California, north to Chelan County, Washington, and east to Idaho County, Idaho [73, 137]. Its core distribution lies in the foothills of northern California and southwestern Oregon [73].

Fast-growing, Alnus rhombifolia (White Alder) is a medium-sized deciduous tree of graceful habit with a straight trunk, and a pyramidal crown in youth, becoming more oval with age. The slender, horizontal branches spread out, then droop at the tips.

Generally found on moist sites along streams and on lower mountain slopes. White alder is closely related to red alder (Alnus rubra). Although the two species are difficult to differentiate when growing together, their distribution and habitats do not overlap to any great extent.

A North American native commonly found along streams, White Alder is a quick-growing tree (to 30 inches per year) reaching 50 to 75 feet in height, sometimes up to 100 feet, and has a spread of 30 to 40 feet (Fig. 1).

Alnus rhombifolia is a tree that is native to California, and also found elsewhere in western North America. This plant is available commercially. Jepson eFlora. Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025.

White alder is used for firewood, as lumber, and as an ornamental. Native Americans extracted red dye from the bark and used it for their baskets, and made a perspiration-inducing tea from it, used in their sweat houses. Its greatest value lies in the ability to …

Alnus rhombifolia is the common alder throughout the dry Mediterranean climatic zone of coastal western United States. Mexican populations are not known, but because A . rhombifolia has been collected as far south as San Diego, California, it should be expected in adjacent Baja California.