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Sphagnum affine a été observée pour la première fois sur le plateau de Millevaches (Corrèze). Son écologie et ses effectifs sont présentés ici, ainsi qu’une comparaison avec les autres populations connues en France. L’origine de cette population est brièvement discutée.

Introduction. Codonoblepharon forsteri (Dicks.) Goffinet is a rare epiphytic moss characteristically associated with water-filled holes in trees. We reviewed its range and population and assessed effects of climate change. Methods. An inventory of sites from where Codonoblepharon forsteri has been recorded was compiled. Extent of occurrence (EOO) and area of occupancy (AOO) were calculated. Population size was estimated, treating an occupied tree as an ‘individual-equivalent’ of the moss. Climatic conditions of the species’ current distribution were characterised, and an ensemble model of its distribution was generated. The latter was projected onto present and future climatic layers. Key results. Codonoblepharon forsteri has been recorded from 19 countries and 205 sites in Europe, North Africa and Southwest Asia. It has been undergoing an overall decline. Most sites have few occupied trees, and a world population of 1000–10, 000 individual-equivalents is estimated. Model projections suggest that the species will experience a range increase of +0.36–0.65 by 2050 and +0.35–0.68 by 2070, especially in its northwest range, particularly across France and the UK. Range loss is predicted to be between – 0.20 and –0.39 in 2050 and –0.21 and –0.65 in 2070, affecting the driest areas of the current range around the Mediterranean, especially in North Africa. Conclusions. Codonoblepharon forsteri has a relatively large EOO but relatively small AOO, probably due to habitat specialism. A major reason for recent declines appears to be widespread abandonment of traditional ‘pollarding’ of trees. The potential climatic range of the species will shift significantly northwards over the next few decades.

Le Lescuraeetum mutabilis Greter ex Wilm. 1962 (Neckeretea complanatae Marst. 1986) est une association corticole acidiphile colonisant la base des troncs tortueux des vieux hêtres, à l’étage subalpin, ou au montagnard supérieur, au sein de communautés trachéophytiques relevant respectivement de l’Acerion pseudoplatani (Oberdorfer 1957) Rameau in Rameau, Mansion & Dumé 1993 nom. nud., du Fagion sylvaticae Luquet 1926 (pour les communautés neutrophiles) ou du Luzulo luzuloidis-Fagion sylvaticae Lohmeyer & Tüxen in Tüxen 1954 (pour les communautés acidiphiles). Cette association substratohygroclinophile, psychrophile, strictement inféodée aux forêts alticoles, est caractérisée dans le Massif central par la présence de 4 espèces : Lescuraea saviana, L. mutabilis, Sciuro-hypnum reflexum et Sanionia uncinata. La haute fréquence de Lescuraea saviana est une originalité régionale de l’association, considérée comme insuffisante pour définir une sous-association, mais permettant cependant l’individualisation d’une race géographique méridionale de cette association largement répandue dans les massifs montagneux du domaine tempéré européen. Cette association cryophile présente certainement une grande sensibilité vis-à-vis de l’augmentation des températures et des modifications du régime de précipitation et possède un fort enjeu conservatoire.

Bryophytes of China-clay works have received very little attention in France to date. Repeated bryological surveys were undertaken in a 5-ha disused China-clay mine at Echassieres in Allier (centra...

a The Natural History Museum, Cromwell Road, London, SW7 5BD, UK; b Department of Plant and Animal Production, Munzur University, Vocational School of Tunceli, Tunceli, Turkey; c International School of Advanced Studies, University of Camerino, Camerino (MC), Italy; d Grupo de Investigación Biología para la Conservación, Universidad Pedagógica y Tecnológica de Colombia, Colombia; e Botanical Survey of India, Central National Herbarium, Howrah, India; f Botanical Garden-Institute, Russian Academy of Science, Vladivostok, Russia; g Viale Rovereto, Trento, Italy; h Department of Botany, Kherson State University, Kherson, Ukraine; i Kherson Branch of Admiral Makarov University, Kherson, Ukraine; j Institute of Industrial Ecology Problems of the North of the Kola Science Center of RAS, Apatity, Murmansk Province, Russia; k University of Insubria, Varese, Italy; l Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, E-30100, Murcia, Spain; mTeam of Ecological Survey Research, National Institute of Ecology, Seocheon, Korea; n Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain; o Centro de Investigación en Biodiversidad y Cambio Global, Madrid, Spain; p Institute of Biology Komi Science Centre UB RAS, Kommunisticheskaja St., 28, Syktyvkar, 167982, Komi Republic, Russia; q Botanical Museum, P.O. Box 7, FI-00014 University of Helsinki, Helsinki, Finland; r Department of Landscape Architecture, Faculty of Architecture, Niğde Ömer Halisdemir University, Niğde, Turkey; s Geobotany Department, Lomonosov Moscow State University, Moscow, Russia; t Botanical Garden-Institute, Far East Branch of Russian Academy of Sciences, Vladivostok, Russia; u Departamento de Biodiversidad, Ecología y Evolución, Facultad de Biología, Universidad Complutense de Madrid, 28040 Madrid, Spain; v Departamento de Botánica y Geología, Facultad de Farmacia, Universidad de Valencia, Avda, Vicente Andrés Estellés s/n, E-46100 Burjassot, Spain; wDepartment of Systematics, Biodiversity and Evolution of Plants, Albrecht von Haller Institute, University of Göttingen, 37073 Göttingen, Germany; x Donceel, Belgium; y Conservatoire Botanique National du Massif Central, Chavaniac, Laffayette, France; z Plant Resources Division, National Institute of Biological Resources, Incheon, Korea; aaAdnan Menderes Üniversitesi, Fen Edebiyat Fakültesi, Biyoloji Bölümü, TR-09010 Kepez-Aydin, Turkey; abPolar-Alpine Botanical Garden, Kola Science Centre, Russian Acadamy of Science, Kirovsk-6, Murmansk Province 184256, Russia; acInstitute of Botany, University of Natural Resources and Life Sciences Vienna, Vienna, Austria; adDepartment of Botany, University of South Bohemia, České Budějovice, Czech Republic; aeFreie Universität Berlin, Institut für Biologie, Systematische Botanik und Pflanzengeographie, Altensteinstr, 6, D-14195 Berlin, Germany; afKomarov Botanical Institute of the Russian Academy of Sciences, St. Petersburg, Russia; agDepartment of Botany, University of Calcutta, Kolkata, India; ahTetbury, Gloucestershire, UK; aiDepartment of Botany, University of British Columbia, Vancouver, British Columbia, Canada; ajValkenswaard, The Netherlands; akLicenciatura en Biología, Universidad Distrital Francisco José de Caldas, Torre de Laboratorios, Bogotá, Colombia; alMTA Centre for Ecological Research, Institute of Ecology and Botany, Vácrátót, Hungary; am51 Wood Street, Wallingford, Oxfordshire, OX10 0AX, UK; anDepartamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Brazil; aoDepartment of Environmental and Life Science, University of Cagliari, Sardinia, Italy; apCera dos Pomares, Aljezur, Portugal; aqKomarov Botanical Institute of the Russian Academy of Sciences, St. Petersburg, Russia; arDepartment of Biological, Geological and Environmental Biology, University of Catania, Catania, Italy; asCSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, India; atThe Ministry of Forests, Lands, Natural Resource Operations and Rural Development, B. C. Government, Victoria, British Columbia, Canada; auDepartment of Botany, Bijoy Krishna Girls’ College, Howrah, West Bengal, India; avCenter for Biodiversity Research and Extension in Mindanao (CEBREM), Central Mindanao University, Musuan, Bukidnon Province, 8710 Mindanao Island, Philippines; awDepartamento de Botánica y Geología, Facultad de Ciencias Biológicas, Universitat de València, Avda. Dr. Moliner 50, E-46100, Burjassot, Valencia, Spain; axVia Selvotta, Muzzana del Turgnano, Udine, Italy; ayInstitute of Environmental Sciences, Kazan Federal University, Kazan, Tatarstan Republic, Russia; azCalifornia Academy of Sciences (CAS), 55 Music Concourse Drive, Golden Gate Park, San Francisco, CA 94118, USA; baInstitute of Biology Bucharest of Romanian Academy, 296 Splaiul Independentei, 060031 Bucharest, P.O. Box 56-53, Romania; bbDepartment of Biology, Faculty of Science and Letters, Aksaray University, Aksaray, Turkey; bcDepartment of Forest Engineering, Faculty of Forestry, Çankırı Karatekin University, Çankırı, Turkey; bdInstitute of Botany and Biodiversity Research, University of Vienna, Vienna, Austria; beMissouri Botanical Garden, 4344 Shaw Boulavard, St. Louis, Missouri, 63110, USA

Recent fieldwork in Tunisia resulted in the discovery of one liverwort (Saccogyna viticulosa (L.) Dumort.) and three mosses (Orthotrichum bistratosum (Schiffn.) J.Guerra, Pseudotaxiphyllum elegans (Brid.) Z.Iwats., Tortula protobryoides R.H.Zander) new for mainland Africa. The localities are briefly described with a focus on habitats, accompanying species, and comments on taxonomy and variability. Conservation actions are urgently needed in Tunisia in light of rising anthropogenic pressures.

Sphagnum subnitens Russow & Warnst. is a Northern Hemisphere eastern Atlantic―eastern Pacific species (Laine et al. 2018) known from North Africa, Western Asia, the Azores, Madeira and most of cont...

Eight major serpentine sites in the French Massif Central have been bryofloristically surveyed and their specific assemblages studied by performing systematic releves. Seventy bryophyte taxa are reported from these serpentine areas. Archidium alternifolium, Bryum gemmilucens, Cephaloziella stellulifera, Grimmia dissimulata, Racomitrium fasciculare, R. lanuginosum and Riccia subbifurca are dominant and characteristic species. Soil and rock communities harbour typical combinations of specialized and ubiquitous taxa. The occurrence of saxicolous species (Grimmia) on the ground may be a typical feature of serpentine communities. The scarcity of liverworts is underlined, as is the complexity of the controlling factors. Lack of competition and periodic submergence are probably ecological factors of prime importance. Successional pathways are certainly insufficiently known, especially as far as bryophytes are concerned. The causes of negligible succession on skeletal soils would benefit from renewed stud...

Recent collections of Heterocladium flaccidum (Schimp.) A.J.E.Sm. in Tunisia and in Georgia (Caucasus) represent the first records of this species both in Africa and Asia. Molecular phylogenetic analysis of samples from France, Great Britain, Tunisia and Georgia placed the species in a maximally supported clade sister to or nested in other species of Heterocladium s.str., i.e., excluding recently segregated Heterocladiella species. This genetic distinction of H. flaccidum from H. heteropterum (Brid.) Schimp., found in separate analyses of ITS and trnS-F markers, strongly supports the specific recognition of H. flaccidum. Representative African and Asian specimens are illustrated and described. Ecological and chorological details are provided.

Le nom de l’association nouvelle décrite dans l’article d’Hugonnot (2020) n’est pas validement publiée car le code de nomenclature phytosociologique en cours jusqu’au 31décembre 2020 (ICPN, Weber et al. 2000) ne permettait pas une validation nomenclaturale sous forme de publication numérique (art. 1). A partir du 1er janvier 2021 c’est le nouveau code (ICPN, Theurillat et al. 2020) qui est applicable. Il précise dans l’article 1 les modalités d’une publication numérique effective. Le présent article a donc pour but d’appliquer ces modalités et de valider, selon le nouveau code, le nom de l’association décrite dans Hugonnot (2020). On se référera à ce dernier article pour une description plus précise et une bibliographie plus complète.

Introduction. Following on from work on the European bryophyte Red List, the taxonomically and nomenclaturally updated spreadsheets used for that project have been expanded into a new checklist for the bryophytes of Europe. Methods. A steering group of ten European bryologists was convened, and over the course of a year, the spreadsheets were compared with previous European checklists, and all changes noted. Recent literature was searched extensively. A taxonomic system was agreed, and the advice and expertise of many European bryologists sought. Key results. A new European checklist of bryophytes, comprising hornworts, liverworts and mosses, is presented. Fifteen new combinations are proposed. Conclusions. This checklist provides a snapshot of the current European bryophyte flora in 2019. It will already be out-of-date on publication, and further research, particularly molecular work, can be expected to result in many more changes over the next few years. © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.

The species was collected in the Pannonian region of Croatia, on sandy banks in the lower course of the Garešnica River, a tributary of the Ilova, belonging tot he Sava River catchment and Black Sea Basin. At the site, the river has a lowland character, but the river bed is heavily regulated and recent channelisation has resulted in extremely steep banks and the complete loss of aquatic vegetation. Several tufts of Physcomitrium sphaericum were found in the narrow open zone along the river where a pioneer ephemeral dwarf- cyperaceous vegetation of periodically flooded habitats had developed on exposed sand. The plants were typically developed, about 4 mm high including seta and semiglobose capsules, displaying characteristic leaf morphology with margins entire or obscurely crenulate above, leaf apex blunt with costa ending below the apex. Physcomitrium sphaericum is an ephemeral species of rare and sporadic occurrence, dependant on seasonally exposed mud on the margins of rivers, ponds, lakes and reservoirs It belongs in the vegetation class Isoëto- Nanojuncetea Br.-Bl. et Tx. in Br.-Bl. et al. Physcomitrium sphaericum was found along with other typical species of this vegetation type: Cyperus michelianus (L.) Link, C. fuscus L., C. glomeratus L., Gnaphalium uliginosum L., Gypsophila muralis L., Lindernia dubia (L.) Pennell, L. procumbens (Krock.) Philcox, Ludwigia palustris (L.) Elliott and a terrestrial form of Riccia fluitans L. Physcomitrium sphaericum is a Eurasian Temperate element, distributed throughout Europe, but rarely found in Southeastern Europe, where it has been reported only from Romania, Bosnia and Herzegovina and Serbia, being considered Vulnerable in the latter. Our record is the first for Croatia.

A striking collection of Syntrichia Brid. with epilose leaves was recently made in the eastern Pyrenees (French department of Pyrenees-Orientales). Examination of relevant type specimens and compar...

Riccia sommieri Levier is reported for the first time in Corsica, France. The ecology of the species in Corsica is described. Several morphological characters are deeply examined and critically evaluated based on the analysis of the material collected in the new Corsican localities and 24 additional herbarium specimens from various origins. As a result, ventral strips called “bandelettes” in Jovet-Ast's publications are referred to remnants of ventral scales. The hypodermis of Riccia sommieri is unique in the genus Riccia. This might support a phylogenetically and taxonomically isolated position of the species.

The Nature Reserve of Tre Padule de Suartone (Corse-du-Sud, 2A) has been bryofloristically surveyed at the beginning of May 2017. Relevant data from literature, herbarium specimens and intensive field work allowed 1 Hornwort, 25 Liverworts and 57 Mosses (83 taxons) to be listed. Among most significant findings, Riccia sommieri, Ephemerum crassinervium subsp. rutheanum and Myricoleopsis minutissima are new records for Corsica. Important habitats are the humid maquis, linked to hydrographic network, and remnants of Quercus ilex woodlands. Maquis and woodlands are very restricted spatially and would beneficiate from conservation actions. The significant impact of herbivores on bryophytic assemblages is underlined, most significantly at the margin of temporary ponds., La réserve naturelle des Tre Padule de Suartone (Corse-du-Sud, 2A) a fait l’objet d’un inventaire des bryophytes début mai 2017. L’examen des données de la littérature, des spécimens d’herbier et des prospections intensives sur le terrain ont permis de recenser 1 anthocérote, 25 hépatiques et 57 mousses (83 taxons). Parmi les découvertes remarquables, Riccia sommieri, Ephemerum crassinervium subsp. rutheanum et Myricoleopsis minutissima sont nouvelles pour la Corse. Les habitats les plus riches en bryophytes correspondent aux maquis humides liés au réseau hydrographique et aux lambeaux de yeuseraies. Ces deux habitats sont limités dans l’espace et présentent ainsi des enjeux de conservation importants. L’impact fort des herbivores sur les cortèges bryophytiques est souligné, en particulier sur les abords des mares temporaires., Hugonnot Vincent, Simont Vincent. Inventaire des bryophytes de la réserve naturelle des Tre Padule de Suartone (Corse-du-Sud, 2A, France). Espèces remarquables et enjeux liés au pâturage / Bryophytes of the Nature Reserve of Tre Padule de Suartone (Corse-du-Sud, France). Remarkable species and issues linked with grazing . In: Ecologia mediterranea, tome 44 n°1, 2018. pp. 19-31.

Anthropization has led to severe river incision in several parts of Europe. Biomonitoring is of interest to characterize this incision or, conversely, the effectiveness of ecological restoration. Mosses of the upper flood zone are good candidates for such biomonitoring as they are small organisms with limited water-intake ability. Here we studied the Dialytrichia mucronata (Brid.) Broth. – D. saxicola (Lamy) M.J. Cano species pair, both mostly encountered in the upper flood zone; the latter was hypothesized to be more resistant to water stress. We analysed 179 bryosociological releves in the French Rhone River watershed, distributed along a wide ecological interval. We performed Pearson's Chi-square test to determine whether the latitude, altitude, substrate, and phorophyte had an effect on Dialytrichia (Schimp.) Limpr. species distribution. Assemblages between D. mucronata and D. saxicola and other moss species were tested using a multivariate procedure. Also we compiled a preliminary French departmental scale distribution map for both species. The results showed that the two species differ ecologically and might be more stenoecious than suggested by their wide synecological spectrum. Eighty-three bryophyte species were documented to be associated with the studied species of Dialytrichia. The cumulative projected inertia for the first three axes of the factorial correspondence analysis was only 23.26%, with no clear structuration. It is concluded that neither the relative occurrence of D mucronata and D. saxicola, nor the communities with these species can be used to monitor incision driven changes in vegetation.

1. Amphidium lapponicum (Hedw.) Schimp.Contributor. R. OchyraPoland. Western Carpathians, Western Beskidy Mountains: Beskid Żywiecki Range, Babia Gora massif, on the northern slope of Diablak peak,...

Buxbaumia viridis is a well-known species of decaying deadwood, which is protected in Europe. All previous studies dealing with the ecology of B. viridis rely on the sporophyte generation because the gametophyte generation is allegedly undetectable. Recent advances have shown that the protonemal stage, including gemmae, is recognizable in the field, thereby considerably modifying our perception of the species&rsquo, range and habitat. In France, we demonstrate the existence of independent protonemal populations, with the implication that the range of B. viridis is widely underestimated. Sporophytes and sterile protonema do not share the same ecological requirements. The sporophyte stage was found in montane zones, almost exclusively in coniferous forests, and on well-decayed wood. The sterile protonemal stage extends to lower elevations, in broad-leaved forests, and on wood in a less advanced state of decay. Our results suggest that the humidity could be one of the most relevant explanatory variables for the occurrence of sporophytes. Opening of the canopy seems to promote sporophyte development. Previous anomalous observations of B. viridis growing on humus or bark might be explained by the presence of a protonemal population that is able to produce sporophytes under rarely occurring but favorable climatic events.

The invasive Campylopus introflexus (Hedw.) Brid. is suspected to outcompete native bryophytes but we know very little about the mechanisms involved in its success. We used extensive mixed-stands of Campylopus introflexus and the indigenous C. pilifer Brid. in a French Nature Reserve to study comparative ecological niches, growth rates, density and reproduction between the two mosses. A re-evaluation of the discriminant morphological characters was first undertaken to allow a straightforward separation of both species in the field. Sporophytes were never encountered on Campylopus pilifer, whereas they are produced in great profusion by C. introflexus, implying a massive sporal investment. In contrast, Campylopus pilifer can produce deciduous shoot-tips in mature colonies whereas C. introflexus is apparently unable to do so, the propagules being restricted to immature developmental stages. Campylopus pilifer does not occupy exactly the same niche as C. introflexus. Only Campylopus pilifer occupies the hars...

Hugonnot, V. 2019. New ecological and distributional data on Lewinskya shawii in France and its conservation in anthropogenic environments – Herzogia 33: 188 –206.Lewinskya shawii is a southern and Central European and Mediterranean species occurring disjunctly in western North America. It has large populations in the Massif Central and Auvergne region, France, where numerous new localities are herein reported. Its national distribution in France is therefore updated. The ecology of the species was studied by analysing recent releves performed on a variety of phorophytes, mostly ash (Fraxinus excelsior) and beech (Fagus sylvatica). Lewinskya shawii occurs in urban and non-urban habitats, but to a large extent on well-illuminated trees in the open countryside, where it can be associated with rich epiphytic assemblages. Such trees are mostly pollards with Orthotricha growing abundantly on the trunk. In Auvergne, the anthropogenic environment is considered to be favourable to epiphytic Orthotricha s.l. It is suggested that light is a key factor for epiphytic assemblages in urban environments. Preliminary recommendations for the conservation of Lewinskya shawii and associated Red-Listed bryophytes in the small towns of Auvergne are given. Traditional management activities are considered capable of maintaining highly diverse epiphytic assemblages.

Studies of the Tunisian bryoflora are disparate and mostly quite outdated. In order to enhance and update our knowledge, a survey of Anthocerotophyta and Marchantiophyta of Kroumiria was carried out in May 1-5, 2017, recording two hornworts and 30 liverworts including Riccia gougetiana Durieu & Mont. var. armatissima Levier ex Mull.Frib., new to the area. The liverwort and hornwort flora of Kroumiria now stands at 80 reliably recorded taxa, of which 22 species may be threatened. Numerical analyses were used to specify the requirements of the 32 listed taxa for substrate, light, temperature and humidity and to distinguish seven different ecological groups ranging from the hydro-thermo-photophile to the mesohygro-sciaphile.

As a result of recent field work, three liverworts (Myriocoleopsis minutissima subsp. minutissima (Sm.) R.L. Zhu, Y. Yu & Pocs, Riccia cavernosa Hoffm. emend. Raddi, Riella notarisii (Mont.) Mont.) and five mosses (Brachytheciastrum dieckei (Roll) Ignatov & Huttunen, Hedwigia striata (Wilson) Bosw., Orthotrichum laevigatum J.E. Zetterst., Tortula schimperi M.J. Cano, O. Werner & J. Guerra, and Zygodon forsteri (Dicks.) Mitt.) were newly recorded for Corsica. The new localities are briefly described. As a result, the bryophyte flora of Corsica now comprises 587 species, among which 424 mosses, 160 liverworts and three hornworts.

1. Acroschisma wilsonii (Hook.f.) A.JaegerContributor: H. Bednarek-OchyraVenezuela: (1) Merida, Paramo de Mucubaji, vertiente de la Laguna de los Patos, Sierra de Santo Domingo, sobre roca ignea, 3...

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A bryological survey of Barrès Beech forest (Ardèche) was performed. 96 bryophyte taxa were observed among which several remarkable species, such as Seligeria recurvata, S. calcarea or Serploeskea confervoides. Orophilous taxa are well represented within this mountain enclave in the heart of Mediterranean vegetation. This is a biogeographic originality. Bryophyte assemblages are described and compared with abyssal Beech-wood of Sainte-Baume or Massane. The virtual absence of dead-wood bryophytic communities and the scarceness of corticolous assemblages are underlined. The originality of Barrès bryophyte flora could significantly be improved as a result of adequate forest managment. In the strict nature reserve, non-intervention type of managment is recomended. Outside the reserve, restructuring by selection of best branches in multi-trunks trees and a more irregular management are pointed as main objectives., Un inventaire bryologique de la hêtraie de Barrès (Ardèche) a été réalisé. Il a permis de mettre en évidence la présence de 96 taxons. Plusieurs espèces remarquables ont été observées comme Seligeria recurvata, S. calcarea ou Serploeskea confervoides. L’élément orophile est bien représenté dans cette enclave montagnarde au coeur de la végétation méditerranéenne, ce qui constitue une originalité biogéographique. Les cortèges bryologiques sont décrits et comparés avec ceux d’autres hêtraies méridionales abyssales, comme celle de la Sainte-Baume ou de la Massane. L’absence de cortège saprolignicole et la pauvreté des assemblages corticoles sont soulignées. La singularité de la flore bryologique de la hêtraie de Barrès est certaine mais pourrait grandement être améliorée par une gestion adéquate des peuplements forestiers. Dans la Réserve biologique intégrale (RBI), la libre évolution est préconisée. En dehors, sur les marges de la RBI, une restructuration par balivage des cépées et une gestion plus irrégulière sont pointées comme les objectifs principaux., Hugonnot Vincent. La flore bryologique de la Réserve biologique intégrale (RBI) de la hêtraie de Barrès (Ardèche) et sa place dans le contexte des hêtraies abyssales de France méridionale / Bryological flora of Barrès Beech forest strict nature reserve (Ardèche) and its position within the context of ravine Beech forests of Mediterranean France . In: Ecologia mediterranea, tome 44 n°1, 2018. pp. 5-18.

Hugonnot, V. & Celle, J. 2015. A new, epiphytic, paradoxical bryophyte association from south-eastern France: the Cinclidoto fontinaloidis-Orthotrichetum sprucei. — Herzogia 28: 77–86. The description of the Cinclidoto fontinaloidis-Orthotrichetum sprucei ass. nov. in south-eastern France is provided. This remarkable community is strongly linked to pioneer soft-wood stands in dynamic hydrosystems. The riparian forest community is characterized by a strong connectivity to the functioning of the river and one character species, Orthotrichum sprucei. Dialytrichia mucronata and Cinclidotus fontinaloides are differential species. The morphology of the main river channel, river flows and coarse sediment deposition are of prime importance in the maintenance of the association. Alluvial dynamics exert selective pressure on this temporary hygrophilic-xerophilic association, whose ecological requirements appear in this respect somewhat paradoxical.

Aloina bifrons (De Not.) Delgad. is recorded for the first time in France in the Limagne, Puy-de-Dome department, Auvergne region. This is a significant northward extension of the species' known range. It grows there on sunny marlaceous lime with gypsum traces on a south-facing steep slope. The French habitat differs significantly from the situation recorded in other parts of the Mediterranean and Irano-Turanic areas, where Aloina bifrons is a typical inhabitant of gypsum soils with a rich assemblage of Xeropottioid elements.

The conservation of rare and endangered species like Orthotrichum rogeri Brid. requires a precise knowledge of their ecology and distribution. However, the scarcity of financial resources and the inadequacy of chorological data difficult the design of efficient conservation policies. In this context, species distribution models (SDM) can provide useful information to apply conservation measures over large areas like Auvergne region, France (26,000 km2). Unfortunately, the use of SDM to assist the introduction of conservation measures is uncommon in bryology. O. rogeri is a rare and poorly known moss at the national scale which is well represented in Auvergne. The European Union through the “Habitats and Species Directive” made its protection compulsory. The aim of this work is to use SDM to improve our current knowledge on O. rogeri distribution in order to provide guidance for designing conservation measures. To do so, we first designed a survey to gather presence/absence data and then fit logis...

1. Andreaea flexuosa R.Br.bisContributors: R. Ochyra and N. J. M. GremmenHeard Island, Subantarctica: Eastern slope of Scarlet Hill, 340 m a.s.l., 53°06ʹ18ʺS, 73°38ʹ23ʺE, on red consolidated scoria...

The peat bog of Passeben (Saint Laurent de Gosse, Landes) was the subject of a bryological survey. A total of 72 mosses (out of which 11 Sphagnum) and 23 liverworts were observed. Bryum tenuisetum Limpr., Ephemerum spinulosum Bruch & Schimp. ex Schimp., Fuscocephaloziopsis macrostachya var. macrostachya (Kaal.) Váňa & L. Söderstr., Micromitrium tenerum (Bruch & Schimp.) Crosby, Pallavicinia lyellii (Hook.) Carruth., Riccia huebeneriana Lindenb. and Sphagnum molle Sull. appear among the most remarkable species. The peat bog of Passeben is one of the richest in Landes as far as Sphagnum are concerned, at the same level as Plata site. However, Sphagna are spatially limited in their extent and cover only low surfaces. Less than 6 % of the total surface of the site is occupied by Sphagna, the ecological behavior of which was detailed. Sphagnum papillosum is practically the only species which occupy significant surfaces. The Sphagnum vegetation reflects in a remarkable way the dynamic orientations printed by the anthropological disturbances. The topographic convexity seems only weakly peat‑forming in agreement with the small populations of sphagnums which develop there. Previously mined habitats in the Southeast of the site show more consequent coverings of Sphagna, with marked topographic sequences, and show a steady peat accumulation today. The clear dynamic differentiation between mined sectors in the 1950s and the central convexity is probably multifactorial. The capacities of regeneration of the peat bog seem still remarkable and measures aiming at the restart of regressive dynamics should be implemented with the aim of revitalizing the system. The possibilities of conservation of the most notable species are discussed., La tourbière de Passeben (Saint Laurent de Gosse, Landes) a fait l’objet d’un inventaire bryologique. Un total de 72 mousses (parmis lesquelles 11 espèces de sphaignes) et 23 hépatiques ont pu être observées. Bryum tenuisetum Limpr., Ephemerum spinulosum Bruch & Schimp. ex Schimp., Fuscocephaloziopsis macrostachya var. macrostachya (Kaal.) Váňa & L. Söderstr., Micromitrium tenerum (Bruch & Schimp.) Crosby, Pallavicinia lyellii (Hook.) Carruth., Riccia huebeneriana Lindenb. et Sphagnum molle Sull. figurent parmi les espèces les plus remarquables. La tourbière de Passeben est l’une des plus riches du département des Landes en espèces du genre Sphagnum, au même niveau que la tourbière du Plata. Toutefois, les sphaignes montrent une répartition limitée dans l’espace à Passeben et ne couvrent que de faibles surfaces : moins de 6 % de la surface totale du site ENS sont occupés par les sphaignes. Le comportement écologique de chacune d’entre elles est détaillé. Sphagnum papillosum est pratiquement la seule espèce à couvrir des surfaces significatives. La végétation sphagnologique reflète de manière remarquable les orientations dynamiques imprimées par les perturbations anthropiques. Le bombement topographique apparaît faiblement turfigène en accord avec les faibles populations de sphaignes qui s’y développent. Les secteurs exploités au Sud‑Est du site montrent des recouvrements de sphaignes plus conséquents, avec des séquences topographiques marquées, et sont aujourd’hui le siège d’une turfigénèse soutenue. La nette différenciation dynamique entre les secteurs exploités dans les années 1950 et le bombement central relève probablement d’une origine plutifactorielle. Les capacités de régénération de la tourbière apparaissent encore remarquables et des mesures visant le redémarrage de dynamiques régressives pouraient être mises en oeuvre dans le but de redynamiser le système turfigène. Les possibilités de sauvegarde des cortèges et des espèces les plus notables sont discutées., Hugonnot Vincent,Ducout Béatrice,Cazaban Frédéric,Vergne Thierry. Les bryophytes de la tourbière de Passeben (Saint-Laurent de Gosse, Landes) – enjeux conservatoires. In: Le Journal de botanique, n°80, 2017. Décembre. pp. 11-32.

One of the most famous incense juniper (Juniperus thurifera L.) forest of western Alps, Saint-Crepin site, has been floristically surveyed focusing on corticolous assemblages. New data regarding the occurrence of Didymodon johansenii (R.S.Williams) H.A.Crum, a species newly recorded for France, Pseudoleskeella tectorum (Funck ex Brid.) Kindb. ex Broth., Orthotrichum crenulatum Mitt, and Orthotrichum vittii F.Lara, Garilleti et Mazimpaka are provided. The floristic originality of incense juniper's bark is underlined.

1. Anthoceros punctatus L.Contributors: B. Cykowska and F. MogroBolivia: Dept. Tarija, Prov. Arce, near Reserva de Fauna Tariquia reserve, next to the road from Sidras to Camberi, 22°12′09·7″S, 64°...

Tinguy, H., Hugonnot, V., Stoehr, B. & Bick, F. 2019. Arvernella microclada (Amblystegiaceae) newly reported in Vosges (Alsace, France). – Herzogia 32: 200–208.Arvernella microclada is reported for the first time in Vosges (France). This constitutes a significant north-eastern extension of its known range by about 400 km. This species could be widely overlooked due to its very minute stature and inconspicuous habit, and it is probably more widespread than currently known. Arvernella microclada is easily confused with many tiny mosses which are mostly taxonomically unrelated, so that the characters allowing a safe identification are emphasized. Details are provided of its habitat characteristics and associated species in Hautes-Vosges.

Coscinodon horridus, formerly Grimmia horrida, is reported as new to France from two localities. Sporophytes are described for the first time. Morphological and molecular evidence are presented supporting the transfer of G. horrida to Coscinodon. The variability of the species and reproductive traits are discussed and it is compared with morphologically similar taxa.

Bog hollows and hummocks are the habitat of many liverworts. Odontoschisma sphagni (Dicks.) Dumort., Kurzia pauciflora (Dicks.) Grolle and Calypogeia sphagnicola (Arnell & J.Perss.) Warnst. & Loesk...

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.

HUGONNOT, V. & CELLE, J. 2013. The Leptodictyo riparii-Hygroamblystegietum varii ass. nov., a dead wood-dwelling association of near-natural alluvial forests in the Rhone valley (France). - Herzogia 26: 187–195. The description of the Leptodictyo riparii-Hygroamblystegietum varii ass. nov. is given. It is characterized by two species, Leptodictyum riparium and Hygroamblystegium varium. This eutrophic and sciaphilic association thrives on dead wood that is alternately subject to flooding and limited periodic desiccation. It is recognized in the Rhone valley (France) but is most probably more widely distributed in western and central Europe. It is most characteristic of naturally functioning river valleys with a constant erosion of banks and redeposition of alluvial sediments in strongly dynamic soft-wooded forests.

For obscure reasons, sporophytes of the dioicous Hamatocaulis vernicosus are currently unknown in France. With the aim of understanding this failure of sporophyte production we investigated (1) sexual phenology, (2) sex ratio pattern at different spatial scales, (3) limitation of sporophyte formation by the availability of only one sex, (4) limitation of sporophyte formation caused by the distance between male and female, (5) location of sporophytes and (6) the consevation implications of this failure of sporophyte production. Principal results show that phenology cannot explain the failure of sporophyte production. At the regional scale, sporophyte formation is prevented by the fact that several mountain ranges have single-sex populations. The production of spore capsules relies on a strict combination of factors at the local scale: occurrence of sexually expressed mixed-sex colonies, a short distance between male and female individuals and favourable environmental factors (light grazing, high water tabl...

Bryum valparaisense Ther. is reported new to France. It was collected on the Mediterranean coast in the eastern part of Dept. Pyrenees-Orientales. Its ecological requirements and the new locality are briefly described.

Hygrohypnum styriacum (Limpr.) Broth. is reported new to France and the Pyrenees. It was recorded in the eastern part of the mountain range (Pyrenees-Orientales). Its ecological requirements and the new locality are briefly described.