Description: Alnus rhombifolia—White alder. The common alder in California, it grows from Montana west to British Columbia and Montana and south to near the Mexican border. The author of the Flora of North America treatment believes in may be found in Baja California, as well. The species grows near open stream banks and adjacent slopes. It is also found in Mojave and Coloradan deser oases. The long catkins are the staminate catkins. They will open fully in winter. The small catkins may be pistillate, although it is difficult to tell at this stage of their development. The tree that provided the sprig photographed grows at Regional Parks Botanic Garden located in Tilden Regional Park near Berkeley, CA. Date: 23 October 2016, 22:28. Source: 2016-10-22-15.05.54 ZS PMax Alnus rhombifolia-1. Author: John Rusk from Berkeley, CA, United States of America. Camera location 37° 53′ 40.28″ N, 122° 14′ 38.25″ W: View all coordinates using: OpenStreetMap - Google Earth: 37.894522; -122.243959.
Description: English: Distribution range map of Alnus rhombifolia. Date: 1999. Source: Digital representation of "Atlas of United States Trees" by Elbert L. Little, Jr. [1]. Author: U.S. Geological Survey.
Description: English: Riparian Alnus rhombifolia white alder trees along Battle Creek, Tehama County, California. Date: 12 November 2009. Source: Own work. Author: Richjordana. 40.396233,-121.90923 Licensing[edit] Public domainPublic domainfalsefalse. : I, the copyright holder of this work, release this work into the public domain. This applies worldwide.In some countries this may not be legally possible; if so:I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. en:Battle Creek, California