Lilloa 14: 231 (1948).

Protolog: Data lacking. "Argentina. Prov. Tucumán, Valle de Tafí, western slope of Cumbre Potrerillo (Cumbres Calchaquíes), altit. 3600 m.s.m., in the subalpine "pedregales" (rock wastes) of the Puna formation, on the slightly overhung face of a large schistose rock, without accompanying species, Coll. I. M. Lamb, 20. Nov. 1947 (n° 5290, Herb. Crypt. Inst. Lillo n°12500"