Tipos: "Hab. Species rarissima in montuosis aridissimis Prov. San Juan."
[Exsiccata: Not located. No type specimen was conserved (Britton & Rose, 1922; Kiesling, 1984a:255). Britton and Rose (1922: 206) mention: "We know this species definitely only from the original description and a photograph obtained by Dr. Rose in 1915 from Dr. Spegazzini"; the authors do not reproduce this photograph.- Photographs: LP: "Typus!" not written in Spegazzini's hand (Fig. 5).] Katinas et al., Darwiniana 42: 186. 2004
