Freshwater swamp forests are a unique ecosystem with high humidity and many unique plants. Despite being highly humid, forest swamps are relatively unexplored for their bryophyte diversity. The current study examines the diversity of bryophytes and the species compositional differences between various habitats within Sap Cham Pa Swamp Forest, Lopburi Province, Thailand. Bryophyte diversity in the area was surveyed using systematic sampling plots. From these plots, we collected specimens to identify species and compare their composition in different areas (shade and open areas) in the study area. The survey revealed 18 species of bryophytes, including mosses (four families, five genera, eight species) and liverworts (one family, four genera, ten species). The shaded area had a higher number of species than the open area. Species compositions were not significantly different between the shaded and open areas. Our data revealed the relatively high diversity of bryophytes, despite the small study area.

  Cultured, uniclonal embryos of the moss Aloina ambigua (Bruch & Schimp.) Limpr. (Pottiaceae) were subjected to four different rates of drying and allowed to develop mature operculate capsules. These capsules were stored for 10 years in darkness at ～23℃ and ～35% relative humidity. Spores from embryos dried slowly tolerated desiccation better than spores from embryos dried rapidly, having a higher germination percentage, an earlier time of germination, a greener color, a larger diameter, and fewer abortive spores. Thus, a stress implemented on the early diploid phase of development (embryo), was manifested as altered stress tolerance (the ability to tolerate long dry periods) in the early haploid phase (spore), perhaps the first report of transgenerational stress effects in bryophytes. Maternal provisioning of greater resources to spores is postulated as the mechanism responsible for a higher desiccation tolerance in spores derived from embryos that were very slowly dried.

  The family Bryaceae, a prominent group of mosses, plays a vital role in the floristic diversity of India, particularly in the Eastern Ghats, a significant biodiversity hotspot. For the first time, a comprehensive synopsis of Bryaceae in the Eastern Ghats is presented, highlighting its ecological and taxonomic significance. In Eastern Ghats, the family is represented by 14 species viz Brachymenium bryoides Hook. ex Schwägr., B. capitulatum (Mitt.) Kindb., B. ptychothecium (Besch.) Ochi, B. sikkimense Renauld & Cardot, B. walkeri Broth., Bryum argenteum Hedw., B. cellulare Hook., B. pallescens Schleich. ex Schwägr., Gemmabryum apiculatum (Schwägr.) J.R.Spence & H.P.Ramsay, G. coronatum (Schwägr.) J.R.Spence & H.P.Ramsay, G. exile (Dozy &Molk.) J.R.Spence & H.P.Ramsay, G. indicum (Dozy &Molk.) J.R.Spence & H.P.Ramsay, G. klinggraeffii (Schimp.) J.R.Spence & H.P.Ramsay and Rosulabryum capillare (Hedw.) J.R.Spence respectively. This study makes a significant contribution to the knowledge of moss diversity in the area, with three taxa: Brachymenium ptychothecium, B. sikkimense, and Bryum pallescens being reported as new records for the Eastern Ghats. Detailed morpho-taxonomical descriptions of all recorded taxa are provided, facilitating accurate identification and understanding their characteristic features.

  Four species of the Bryaceae are reported as new to North America from the Aleutian Islands: Haplodontium himalayanum (Mitt.) X.R.Wang & J.C.Zhao, Plagiobryum hultenii (Ochi & Perss.) Hedd., Ptychostomum sibiricum (Lindb. & Arnell) J.R.Spence, and P. vermigerum (Arnell & C.E.O.Jensen) J.R.Spence. The status of the high Arctic Ptychostomum teres (Lindb.) J.R.Spence in North America is re-examined with a new record from the islands.

  We report six new moss records for Vietnam: Calyptothecium integrifolium (E.B.Bartram) Nog., C. philippinense Broth., Symphysodontella convoluta (Doz. & Molk.) M.Fleisch., S. involuta (Thwait. & Mitt.) M.Fleisch of Pterobryaceae; Neckeropsis formosica (Broth. & Yasuda) S.Olsson, Enroth, Huttunen & D.Quandt of Neckeraceae; and Pogonatum minus W.X.Xu & R.L.Xiong of Polytrichaceae. Additionally, we update species distributions at the provincial level for 20 species and revise identifications for five species, contributing to a better understanding of Vietnamese moss diversity.

  Two new taxa of Lejeuneaceae, Ceratolejeunea vohimanensis N.G.Hodgetts, sp. nov. and Diplasiolejeunea cavifolia var. laevigata N.G.Hodgetts, var. nov. are described from Madagascar. Illustrations and discussion on possible relationships and differentiation from related taxa are provided.

  In Thailand, three genera of the family Anastrophyllaceae L.Söderstr., De Roo & Hedd. have been reported. Of these, Plicanthus R.M.Schust., has been recently revised and two species including P. birmensis (Steph.) R.M.Schust., P. hirtellus (F.Weber) R.M.Schust. have been confirmed. To complete the study of Anastrophyllaceae in Thailand, a key to three genera and a description and illustrations of the members of Anastrophyllum (Spruce) Steph. and Schizophyllopsis Váňa & L.Söderstr. as well as ecology and geographical distribution are provided.

  Cyathodium tuberosum Kashyap (Cyathodiaceae) previously known from the Sino-Himalayan region, is newly reported in the hill evergreen forest, of northern Thailand. A detailed description, line drawings and photographs are provided. In addition, a lectotype is also designated here.

  A new leafy liverwort, Plagiochila ikiensis T.Katag., sp. nov., is described based on a re-examination of Late Miocene fossils from the Monobe Formation on Iki Island, Nagasaki Prefecture, Japan. The new species is characterized by a simple ramification pattern in the presence of lateral-intercalary and terminal branches, distant leaf arrangement, broadly ovate to suborbicular leaves with entire margins, and hexagonal laminal cells of the leaf. Among the fossil species of Plagiochila, P. ikiensis is most similar to P. saportana Schimp., another Miocene species from France, sharing entire leaf margins, rounded leaf apices, and lacking recognizable underleaves. However, P. saportana can be distinguished from P. ikiensis based on its imbricate and obovate leaves and subpinnate ramification pattern. The lack of reproductive characters prevents a more detailed comparison of P. ikiensis with extant species. This is the first fossil species of the genus Plagiochila and family Plagiochilaceae in Southeast Asia to provide clues regarding the evolution of the genus in Southeast Asia.