<b><i>Alnus incana</i> ssp. <i>rugosa</i></b> — Speckled Alder.
<dl><dd><ul><li>Picture of catkin (male inflorescence.)</li></ul></dd></dl>
Kenneth Dritz. USDA NRCS. 1995. <i>Northeast wetland flora: Field office guide to plant species.</i> Northeast National Technical Center, Chester, PA. Courtesy of USDA NRCS Wetland Science Institute.
1995
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