This small orchid was collected on 16 Jun 1806 along the "waters of Hungery Creek" according to Pursh's copy of Lewis's label. Under Calypso borealis Salisb. (Parad. Lond.: 89. 1808), Pursh (1813: 593) gives the location as "On the Columbia river." If the Lewis label is correct, which seems most probable, the expedition was on the Lolo Trail in Idaho Co., Idaho (Moulton, 1993: 27-31). Lewis collected other plants on this day along a branch of Fish Creek. All previous authors have listed the specimen simply as C. bulbosa (L.) Oakes (in Z. Thompson, Nat. Hist. Vermont 1: 200. 1842). (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:06/16/1806