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New record of the genus Bryoerythrophyllum for Argentina: B. jamesonii. With this discovery, the genus is represented in the country by six species, five in the northwest and one in the south. Bryoerythrophyllum jamesonii has been collected in high altitude grasslands and is distinguished by its dioecious reddish-brown plants; leaves are oblong-lanceolate with a broadly acute and apiculate apex; the margin is flat and recurved above the sheathing base, weakly dentate towards the apex; the costa is papillose ventrally, while smooth on the dorsal side, and the basal paracostal cells have firm walls and are not inflated. This contribution includes the description, illustration, and comments of the species mentioned, as well as a taxonomic key to compare it with its congeners present in the country. [ABSTRACT FROM AUTHOR]

There are 79 species and varieties of Pottiaceae in the Valley of Mexico representing 52% of the total (151) known for the country. These are present in all types of vegetation within an altitudinal range of more than 3000 m; most are widely distributed in Mexico and in the world, 12 species have disjunct distributions, 6 are endemic to Mexico, and 11 are new records for the Valley of Mexico. [ABSTRACT FROM AUTHOR]

The known moss flora of Sierra de Alcaparrosa consists of 84 species and varieties. The Pottiaceae (26 species) and the Bryaceae (10 species) are the families best represented; the remaining include between 1 and 4 species in the area. The moss flora includes a group of 7 cleistocarpic mosses. Among the six phytogeographical elements that of wide distribution is the largest. Other important elements in this moss flora are the endemic (known only from Mexico), disjunct (between Mexico and South America; two species are represented in Africa and Australia) and the mesoamerican (distributed from Mexico to northern South America). [ABSTRACT FROM AUTHOR]