A new species of Marasmius from northern Argentina

Marasmius tyrius is proposed as a new species. It is characterized by collariate lamellae, insititious stipe, violet pileus, pileipellis with Siccus-type broom cells, and clavate to fusoid spores. Detailed description and illustrations of macro-and microscopic characters are provided. © 2011. Mycotaxon, Ltd.Fil:Lechner, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Papinutti, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

<I>Geastrum</I> species of the La Rioja province, Argentina

A survey of Geastrum species from arid lands in the La Rioja province (northwestern Argentina) recovered fourteen species previously unreported from the province: G. arenarium, G. campestre var. famatinum, G. corollinum, G. fimbriatum, G. floriforme, G. glaucescens, G. hieronymi, G. aff. lloydianum, G. pampeanum, G. pampeanum var. pallidum, G. parvistriatum, G. rufescens, G. saccatum, and G. schmidelii. Of these, new records are G. corollinum for Argentina, G. arenarium for South America, and G. parvistriatum for the Americas, and G. campestre var. famatinum is proposed as a new variety. Each taxon is described, and photographs of basidiomes and SEM micrographs illustrating spores are provided for selected taxa. © 2012. Mycotaxon, Ltd.Fil:Kuhar, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Castiglia, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Papinutti, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina