See Meehan (1898: 41) for his review of this fragmentary specimen. Clark first reports this plant on 30 Oct 1805 (Moulton, 1988: 358). On 9 Feb 1806, Lewis provides a brief description (Moulton, 1990: 290), referring to the species as "black alder." The tiny fragments that exist today were collected on 26 Mar 1806. Coues (1898: 311) suggests Lewis and Clark collected the specimen on the lower Columbia River between Puget's Island and the Cowlitz River. On 27 Mar, Lewis states he "saw . . . the growth which resembles the beach" (Moulton, 1991: 19) which Moulton (1991: 22) takes to mean Alnus rubra. At the same time, Lewis reports "the black alder appears as well on some parts of the hills as the bottoms." On 30 Mar, Lewis mentions that "the black alder common on the coast has now disappeared" (Moulton, 1991: 32). (The Lewis & Clark Herbarium Digital Imagery Study Set, ANSP, 2002) On deposit at the Academy of Natural Sciences, Philadelphia Collected by:Meriwether Lewis & William Clark Collection date:03/26/1806