Mabberley (1997, Telopea 7: 171) accepts Merrill Spec. Blancoan. 402 as neotype but citing several herbaria ("UC, n.v.; BM, K), based on Swingle (1943) who cited Merrill's Spec. Blancoan. 402 as "substitute type" but without citing any herbarium. According to attached notes by Dan Nicolson (2001), there is some doubt as to whether neotypification has been effected, and also whether the two respective sheets in question at US (Spec. Blancoan. 102, USNH 903777 & Spec. Blancoan. 402, USNH 904086) are correctly labeled.