<b><i>Alnus incana</i> ssp. <i>tenuifolia</i></b> — Mountain Alder, Thinleaf Alder.
Robert H. Mohlenbrock. USDA NRCS. 1992. <i>Western wetland flora: Field office guide to plant species.</i> West Region, Sacramento, CA. Courtesy of USDA NRCS Wetland Science Institute.
1992
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