Gemmabryum J.R.Spence & H.P.Ramsay is considered to be congeneric with two monotypic South American moss genera, Neobryum R.S.Williams and Osculatia De Not., of which the latter has priority. It is the earliest available generic name for one of the largest segregates of the broadly conceived genus Bryum Hedw. which consists of some 44 species disposed in three sections that have a worldwide distribution. Traditionally, they were all placed in Bryum or Brachymenium Schwägr. and the relevant transfers to Osculatia are effected in the present account.
The generic name Dorcadion Adans. ex Lindb. is a superfluous and illegitimate name for Orthotrichum Hedw. The new generic name Dorcadionella Plášek, Sawicki & Ochyra is proposed for a segregate of Orthotrichum which comprises species with superficial stomata that are always monoicous and only occasionally produce gemmae on leaves. Dorcadionella affinis (Schrad. ex Brid.) Plášek, Sawicki & Ochyra is selected as a type of this new generic name. The genus Dorcadionella consists of 63 species and one variety that have a worldwide distribution. Traditionally, they were all placed in Orthotrichum and the relevant transfers to the new genus are effected in the present account.
Orthotrichum pulchellum Brunt. has been collected in Poland recently. So far, only one old record of the species from the nineteenth century is known from this country. The epiphytic moss has been discovered recently on three localities in the north-western part of the country. Diagnostic features and ecology are presented. The historical and recent findings of the species in Poland are briefly discussed and its current distribution is mapped. It is suggested that the species should be placed on the red-list of mosses in Poland in the category “Indeterminate”.
Based on available molecular and morphological evidence, the genus Codriophorus P.Beauv. (Grimmiaceae subfam. Racomitrioideae) proved to be a polyphyletic taxon. It consists of two distinct genera which correspond to two sections of Codriophorus, namely sect. Codriophorus and sect. Fascicularia (Bednarek-Ochyra) Bednarek-Ochyra & Ochyra. The latter section is raised to generic rank as Dilutineuron Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek. The new genus consists of the following five species: D. fasciculare (Hedw.) Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. brevisetum (Lindb.) Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. anomodontoides (Cardot) Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. corrugatum (Bednarek-Ochyra) Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov. and D. laevigatum (Mitt.) Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov.