Frangula purshiana (DC.) J. G. Cooper, Pacif. Railr. Rep., Stevens Exped. 12: 57. 1860, a new name for Rhamnus alnifolius Pursh, Fl. Amer. Sept.: 166. Dec (sero) 1813 (non L'Her., 1788) = R. purshiana DC., Prodr. 2: 25. 1825. - Lectotype: PH-LC 91, left-hand fragment (Moulton 69b), designated here! Duplicate of the lectotype: PH-LC 90 (Moulton 69a). {N.B.: In Reveal et al.'s original text, the equals-sign preceding R. purshiana is typeset as three horizontal parallel lines, indicating a nomenclatural synonym, a symbol unavailable for this html document. -Spamer & McCourt, here} The separation of Frangula from Rhamnus is tentative, but as Moulton (in press) has adopted the above name, we retain it here. The type material was collected near Kamiah in Idaho Co., Idaho, on 29 May 1806 (Moulton, 1991: 302-308). Lewis makes no mention of the species. The following is material added to this electronic publication (E. E. Spamer and R. M. McCourt, PH). On PH-LC 91, Reveal et al. (1999) designate the "left-hand fragment", a Lewis collection, as the lectotype. The larger right-hand specimen is a Menzies collection probably from southwestern Canada or northwestern United States, according to Lambert's annotation (see below). We note that the two small, single leaves on either side of the Menzies specimen more resemble now the (dried) coloration of the Lewis specimen and question their association with the Menzies specimen. If they are Lewis-collected specimens, they are additional duplicates of the lectotype. (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:05/29/1806