Sobre la presencia de Pyrrhobryum spiniforme (Rhizogoniaceae) en el noroeste de Argentina

The genus Pyrrhobryum is represented by 2 species in Argentina: P. mnioides (Hook.) Manuel and P. spiniforme (Hedw.) Mitt. Pyrrhobryum mnioides is known from Tierra del Fuego to Río Negro and P. spiniforme from northeastern Argentina, in Misiones. The latter is recorded for the first time from northwestern Argentina. Ecological notes and specific macroscopic characters are included. A key for the identification of Argentinian species of Pyrrhobryum is provided