An emendation of the generic description of Scleroderma is proposed to consider the membranaceous veil like, or granulose patches, both on the base of the globose basidiome or on the upper part of the stipe, formed by the growth of the basidiome, which breaks the exoperidium. Veligaster previously segregated by this character, is a the genus for S. verrucosum, Sect. Aculeatispora is now a synonym of Sect. Scleroderma, and S. citrinum that was in Sect. Scleroderma is now in a new section named Reticulatae. A review of the 21 Mexican species of Scleroderma is presented, 14 of these are accepted. The most common species in the country is S. nitidum in the tropical and subtropical forests. New localities from Mexico and foreign countries are discussed in S.

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A revision of twenty-eight type collections of Psilocybe is presented. Descriptions of thetypes were completed with characteristics not previously mentioned such as the presence of pseudorhizain the stipe, pileocystidia, caulocystidia and pleurocystidia, as well as the subhymeniumtype and the arrangement of the hyphae in the pileus trama. From this review, only five species: P.aztecorum, P. caerulescens, P. hoogshagenii, P. mexicana and P. muliercula are recognized, leavingthe others as synonyms of these five. In addition, P. hoogshagenii was an invalid name and hereis formally validated. This mushroom is distinguished from the other species of Psilocybe by thepapillate pileus, subrhomboid basidiospores and the presence of two forms of pleurocystidia.

Se registra por primera vez para la micobiota mexicana el género Squamanita con S. umbonata, procedente de un bosque de pino-encino en el estado de Veracruz. Esta especie ha sido citada de Estados Unidos de América (Pennsylvania y Massachusetts), China y Japón. El material estudiado coincide bien con el holotipo de S. umbonata y con otro espécimen del mismo país depositado en el herbario NY, estudiado por Bas.

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