Several interesting epiphylls were collected in recent surveys of bryophytes in Bidoup-Núi Bă National Park, Central Vietnam. Among the 125 samples containing 185 leaves covered by 54 species of which 43 belong to Lejeuneaceae, 5 to Radulaceae, 2 each to Frullaniaceae and Lepidoziaceae, finally a single species each to Plagiochilaceae and Daltoniaceae. Three of them, Cheilolejeunea ventricosa, Cololejeunea angustiflora and Drepanolejeunea tricornua proved to be new to Vietnam while one, Drepanolejeunea (Rhaphidolejeunea) bidoupensis is described, as new to science. This area with its high species richness has proven worth for protection and further exploration.

Cheilolejeunea / Cololejeunea / Drepanolejeunea / Lejeuneaceae / new species / species richness

Ditrichum validinervium Kaal., a species described from Île de la Possession and Île de l'Est in the Îles Crozet archipelago in Subantarctica, is assessed and some details of its gametophyte are illustrated. An examination of the type material of this species revealed that it is inseparable from D. conicum (Mont.) Mitt. and D. validinervium is the first heterotypic synonym of this name.

Bryophyta / distribution / Ditrichum / Icirc;les Crozet / Kerguelen Province / Subantarctica / taxonomy

Two Asiatic Lejeunea species with ocelli in the leaf lobe, Lejeunea moniliata Mizut. and Lejeunea wallichiana (Lehm.) Lehm. ex Gottsche, Lindenb. et Nees, are transferred to Microlejeunea (Lejeuneaceae, Marchantiophyta). Two new combinations are proposed: Microlejeunea moniliata (Mizut.) R.L.Zhu et Y.M.Wei comb. nov. and Microlejeunea wallichiana (Lehm.) R.L.Zhu et Y.M.Wei comb. nov. Microlejeunea moniliata is only known from the type locality in northern Thailand, where it was rediscovered in 2011, and is suggested to be placed in the red list of Thai bryophytes.

Hepaticae / Lejeunea moniliata / Lejeunea wallichiana / liverworts / red list / Thailand

Axenic cultures of the thalloid liverwort Cryptomitrium himalayense Kashyap were established from spores and propagated in vitro under a variety of culture media and controlled environments to determine the optimum conditions for the onset of sexual phase. Enhanced vegetative growth in form of overlapping rosette-forming thalli occurs on half strength Knop's medium as well as in Hoagland medium under continuous illumination of 2.93 W/m² at 21°C from the production of innovations from the basal parts of the dorsal surfaces of the thalli. Thalli became shorter and produced tuberous swelling following nutrient depletion and drying out of the medium. Sex organs were produced only on Hoagland medium supplemented with 1% sucrose under a long day regime with colder nights (16 hours light at 21°C and of 8 hours darkness at 15°C). Thalli acclimatized and transferred on soil also produced sex organs under similar conditions of photoperiod and temperature.

Aphanolejeunea microscopica, Breutelia chrysocoma, Harpalejeunea molleri, Jubula hutchinsiae subsp. hutchinsiae, Lejeunea patens, Plagiochila bifaria, P. exigua are seven hyperoceanic bryophytes which have been recently observed in western Massif Central. The French distribution of each of these species is updated. The ecological requirements of these forest rocks dwelling species are summarized. The examination of their reproductive and demographic characteristics highlights their precarious situation and their strong vulnerability. The conservation of this remarkable element requires adopting constraining measures.

Riella (Riellaceae, Sphaerocarpales) is a genus of aquatic liverworts with a disjunct worldwide distribution in areas of seasonal Mediterranean-type climates. Its centre of diversity is located in the Mediterranean basin, where about half the species number of the genus is concentrated. In the course of a worldwide revision of the genus Riella, plants from a monoicous species with wingless, not papillose and smooth involucres were found in two distant Iberian localities. These plants showed a geminate dorsal wing, unlike the single wing occurring in the remaining species of the genus. This character unambiguously assigns these populations to R. bialata, a species known to date from a single collection in its Algerian type locality. Riella bialata is thus reported as new to Europe. Fresh materials enabled detailed morphological analyses, and the Iberian materials are extensively described and illustrated herein.

Jungermannia exsertifolia Steph. subsp. cordifolia (Dumort.) Váňa has been erroneously reported from Poland twice. These data were published in 1885 and 1975 from the Tatra Mountains and Beskid Sądecki Range (Western Carpathians) area. This paper presents the first correct record of J. exsertifolia subsp. cordifolia from Poland and the Tatra Mountains. It is also the third confirmed locality of this plant in the entire area of the Tatra Mountains.

Bucklandiella lamprocarpa (Müll.Hal.) Bednarek-Ochyra & Ochyra is the only rheophytic representative of the genus in South Africa. Although this distinct and almost unmistakable species is bipolar in distribution, it is mostly an austral cool-temperate species ranging northwards along the alpine belts of South America and Africa. Examples are given of pan-Holantarctic mosses in the Cape Floristic Region and hypotheses put forward to explain this distribution pattern. The South African distribution of B. lamprocarpa is mapped and described in detail.

Two species of liverworts (Anastrophyllum bidens, A. squarrosum) and 10 species of mosses (Acroporium rigens, Daltonia contorta, Dicranella setifera, Meiothecium hamatum, Papillidiopsis macrosticta, Pseudotaxiphyllum pohliaecarpum, Sematophyllum subpinnatum, Trichosteleum boschii, Trichosteleum stigmosum, Warburgiella philippinensis) are reported as new to New Caledonia. Daltonia, Dicranella, Papillidiopsis, and Pseudotaxiphyllum are new genus reports for New Caledonia.

Leptoscyphus Mitt. and Leptoscyphus cuneifolius (Hook.) Mitt. (Lophocoleaceae, Marchantiophyta) found as new to Turkey and Southwest Asia. Descriptions, illustrations, ecology, geographic distribution and comparisons with morphologically similar taxa are also presented.