Species of Hypholoma (Fr.) P. Kumm. (Strophariaceae, Agaricales) in Rio Grande do Sul State, Brazil

Abstract

RESUMO -(Espécies deHypholoma

Synopsis of the Strophariaceae (Basidiomycota, Agaricales) from Floresta Nacional de São Francisco de Paula, Rio Grande do Sul State, Brazil

“…It is known from Northeastern (Wartchow et al 2007) to Southern Brazil (Cortez & Coelho 2004, Silva et al 2006 Deconica horizontalis can be recognized by the crepidotoid habit, beige color and lilaceous gray lamellae. The species was considered in the genus Melanotus Pat., which was later reduced to a subgenus of Psilocybe (Noordeloos 1999) This is a common mushroom in native meadows of Rio Grande do Sul highlands, recognized macroscopically by the slender exanullate stipe and convex to umbonate, slightly viscid pileus (Cortez & Silveira 2007b). It was recently noticed, from the same region of the present study, that males of the orchid bee Eufriesea violacea are attracted by volatile substances produced by this mushroom, evidencing an interesting ecological association between fungi and bees (Capellari & Harter-Marques 2010 This species produces numerous caespitose to gregarious basidiomata and it is diagnosed by the greenish yellow color of pileus and gills, which become dark violaceous with the maturity of the basidiospores.…”

“…Kumm., the lesser stature and little developed veil separate well both taxa. A detailed description of material from Rio Grande do Sul is presented by Cortez & Silveira (2007b 1887. Figures 1-7 Pileus above 50 mm, applanate to depressed in the center, yellowish orange, surface viscid, covered by orange scales radially arranged toward the margin, which is slightly involute and with velar remnants, context fleshy, yellow.…”

“…Quél., especially the presence of acanthocytes in the rhizomorphs. For a detailed description, see Silva et al (2009 This species has been described for the area by Cortez & Silveira (2008) and is similar to Stropharia rugosoannulata and S. hornemanii (Fr.) S. Lundell & Nannf.…”

“…Norvell & Redhead (2000) replaced it to Stropharia because of the presence of acanthocytes in its rhizomorphs. It was previously recorded to the area by Cortez & Silveira (2008).…”

“…More recently, a series of studies on this family from Rio Grande do Sul improved the knowledge of the group with publications by Cortez & Coelho (2003, Cortez & Silveira (2007a, 2007b, Guzmán & Cortez (2004, 2005, Rossato et al (2009), Sobestiansky (2005), Silva et al (2006Silva et al ( , 2009 and Sulzbacher et al (2007).…”