Tortella bambergeri (Schimp.) Broth. in the British Isles

Abstract

The moss Tortella bambergeri (Schimp.) Broth. is added to the described British bryophyte flora. It differs from fragile-leaved forms of T. tortuosa (Hedw.) Limpr. in having the apical quarter of the costa with quadrate, papillose abaxial cells and in having the peristome teeth twisted by a half turn instead of one and a half turns. Other identification features are discussed, and the habitat and distribution of T. bambergeri in Britain are described. Most records are from sandstone boulders in western Britain.     

中国丝瓜藓属直蒴组的分类学研究

采用经典分类学研究方法,对河北师范大学植物标本馆(HBNU)等国内多个标本馆保存的中国丝瓜藓属直蒴组(Pohlia Hedw.section Cacodon Lindb.ex Broth.)及其近缘类群植物标本共计130余号进行了分类学分析鉴定,并对所确定的中国产直蒴组物种的芽胞大小、形状及叶原基数量和长度等形态学特征进行比较分析,以期为中国丝瓜藓属直蒴组的分类学研究提供理论依据。结果表明:(1)经鉴定中国丝瓜藓属直蒴组植物共有8种——夭命丝瓜藓[Pohlia annotina(Hedw.)Lindb.]、糙枝丝瓜藓[P.camptotrachela(Ren.Card.)Broth.]、林地丝瓜藓[P.drummondii(Müll.Hal.)Andr.]、疣齿丝瓜藓[P.flexuosa Harv.]、纤毛丝瓜藓[P.hisae T.J.Kop.et J.X.Luo]、异芽丝瓜藓[P.leucostoma(BoschSande Lac.)M.Fleisch.]、念珠丝瓜藓[P.lutescens(Limpr.)H.Lindb.]和卵蒴丝瓜藓[P.proligera(Kindb.ex Breidl.)Lindb.ex Arnell]。(2)中国丝瓜藓属直蒴组植物的重要鉴别特征是在假根或叶腋处生有芽胞,而且芽胞形状以及叶原基形状和数量在直蒴组中存在差异,如念珠丝瓜藓具有假根生芽胞,而疣齿丝瓜藓具有两型芽胞。(3)对所鉴定的中国丝瓜藓属直蒴组8种植物的识别特征、生境及其与相近种的关系进行了详细描述,并绘制了形态特征墨线图。     

Contribution À L'Étude De Quelques Bryoassociations De L'Étage Subalpin Dans Le Sud-Est De La France

Resume Dans le présent travail, l'auteur effectue une étude bryosociologique de la strate muscinale des rochers et des marécages de l'étage subalpin dans le Sud-Est de la France. Il envisage en particulier les blocs siliceux ombragés occupés par le Grimmietum elatioris (avecGrimmia elatior Bruch,Orthotrichum rupestre Schleich,Grimmia funalis (Schwaegr.) Schimp.,G. doniana Sm.,Dicranum sauteri Schimp.) ainsi que les parois suintantes de gneiss (Blindio-Amphoridietum) colonisées parBlindia acuta (Huds) B.e.,Amphoridium mougeotti B.e.,Fissidens osmundoides Hedw.,Saccobasis polita (Nees) Bruch,Gymnostomum rupestre Schleich. Les rochers calcaires en exposition froide portent, sur le pourtour de l'Argentera-Mercantour l'association àEncalypta streptocarpa Hedw. etPlagiopus oederi (Schwaegr.) Schimp. (Encalypto-Plagiopetum) très largement répandue dans les Alpes du Sud, alors qu'au voisinage des cascades appara?t une formation tufogène montagnarde àHymenostylium recurvirostre (Hedw.) Dix etSouthbya nigrella (De Not) Spruce. Les tourbières àSphagnum acutifolium Warnst,S. teres Angst,S. platyphyllum Warnst,S. recurvum P.B.,Aulacomnium palustre (Hedw.) Schwaegr. etMeesea triquetra (Hedw.) Angst. semblent inféodées, dans les régions étudiées, au vieux massif cristallin (Lac Nègre, Boréon, Vallée des Merveilles) où elles se rencontrent à partir de 1900 mètres d'altitude. Enfin, les marécages sur calcaire ou sur flysch portent des peuplements à base deBryum pallens Sw.Philonotis fontana (Hedw.) Schwaegr.,Cratoneurum commutatum (Hedw.) Roth. avec par endroitsMeesea uliginosa Hedw. etAmblyodon dealbatus (Dicks) P.B.

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Summary In this work, the author carries out a bryosociological study concerning the vegetation on rocks and bogs in the subalpine district of the high mountains of southern France. He considers particularly the siliceous blocks covered with carpets ofGrimmia elatior Bruch,Orthotrichum rupestre Schleich,Grimmia funalis (Schwaegr.) Schimp.,G. doniana Sm.,Dicranum sauteri Schimp. (Grimmietum elatioris) and the oozing gneiss-walls (Blindio-Amphoridietum) colonized byBlindia acuta (Huds) B.e.,Amphoridium mougeotti B.e.,Fissidens osmumdoides Hedw.,Saccobasis polita (Nees) Bruch., andGymnostomum rupestre Schleich. On calcareous rocks, in cold places, surrounding the Argentera-Mercantour, he found an association withEncalypta streptocarpa Hedw. andPlagiopus oederi (Schwaegr.) Schimp., (Encalypto-Plagiopetum) which is very common in the southern alps, and near waterfalls occurs a travertinic mountain-formation withHymenostylium recurvirostre (Hedw.) Dix andSouthbya nigrella (De Not) Spruce. The peat-bogs containingSphagnum acutifolium Warnst.,S. teres Angst,S. platyphyllum Warnst.,S. recurvum P.B.,Aulacomnium palustre (Hedw.) Schwaegr. andMeesea triquetra (Hedw.) Angst. seem to be particular to the old crystalline chain where we found them at an altitude of 1900 meters. Finally, calcareous or flysch-bogs present a cryptogamic vegetation withBryum pallens Sew.,Philonotis fontana (Hedw.) Schwaegr.,Cratoneurum commutatum (Hedw.) Roth. and the rareMeesea uliginosa Hedw. andAmblyodon dealbatus (Dicks) P.B.

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Zusammenfassung In dieser Arbeit, führt der Verfasser ein bryosoziologisches Studien der Felsen und der Moore in der subalpinen Stufe Süd-Ost Frankreichs aus. Er beschreibt namentlich die Silikatbl?cke, die im Schatten der W?lder von dem Grimmietum elatioris (mitGrimmia elatior Bruch.,Orthotrichum rupestre Schleich.,Grimmia funalis (Schwaegr.) Schimp.,G. doniana Sm.,Dicranum sauteri Schimp.) bedeckt sind, und die feuchten Gneissw?nde (Blindio-Amphoridietum), die vonBlindia acuta (Huds.) B.e.,Amphoridium mougeotti B.e.,Fissidens osmundoides Hedw.,Saccobasis polita (Nees) Bruch.,Gymnostomum rupestre Schleich kolonisiert werden. Auf den kalkhaltigen Bl?cken, in der N?he des Argentera-Mercantour traf er eine Moosgesellschaft mitEncalypta streptocarpa Hedw. undPlagiopus oederi (Schwaegr.) Schimp. (Encalypto-Plagiopetum), die in den Süd-Alpen sehr h?ufig ist. An den Quellen und Wasserf?llen erscheint eine tufogene Bildung der montanen Stufe mitHymenostylium recurvirostre (Hedw.) Dix undSouthbya nigrella (De Not) Spruce. In unserer Gegend, sind die Torfmoore mitSphagnum acutifolium Warnst.,S. teres Angst,S. platyphyllum Warnst,S. recurvum P.B.,Aulacomnium palustre (Hedw.) Schwaegr., undMeesea triquetra (Hedw.) Angst. dem alten kristallartigen Gebirgsstock eng belehnt, wo wir sie immer ab 1900 meter gefunden haben. Endlich, tragen die Kalk oder Flysch-Sümpfe eine besondere Kryptogamenvegetation mitBryum pallens Sw.,Philonotis fontana (Hedw.) Schwaegr.,Cratoneurum commutatum (Hedw.) Roth. und manchmal die seltenenMeesea uliginosa Hedw. undAmblyodon dealbatus (Dicks) P.B.

     

The identity of the Pleistocene mosses Drepanocladus minnesotensis and Neocalliergon integrifolium (Amblystegiaceae)

The type specimens ofDrepanocladus minnesotensis Williams andNeocalliergon integrifolium Williams are shown to beD. aduncus var.kneiffii (B.S.G.) Monk. andScorpidium scorpioides (Hedw.) Limpr., respectively. These fossils, which were originally obtained from late glacial sediments in Minneapolis, Minnesota, together with other mosses identified from the deposit, indicate that deposition probably took place in a shallow depression filled with calcareous water. Pleistocene mosses from near Bronson, Minnesota, originally namedD. minnesotensis are reidentified asD. aduncus (Hedw.) Warnst. andCalliergon giganteum (Schimp.) Kindb.     

Green light drives photosynthesis in mosses

Temperate forests are characterised by variable light quality (i.e. spectral composition of light) at or near the forest floor. These understory environments have a high concentration of green light, as red and blue light are preferentially absorbed by upper canopy leaves. Understory species may be well-adapted for using green light to drive photosynthesis. Angiosperms have been shown to use green light for photosynthesis, but this ability has not been demonstrated in shade-dwelling bryophytes. In this study, net photosynthetic rate (P_N) of three temperate understory species of moss (Dichodontium pellucidum (Hedw.) Schimp., Leucobryum albidum (Brid. ex P.Beauv) Lindb. and Amblystegium serpens (Hedw.) Schimp.) was measured under green, red?+?blue, and red?+?blue?+?green light to assess green light use efficiency. All three species were capable of photosynthesising beyond their respiratory demands using solely green light, with higher green light use efficiency measured in plants collected from areas with greater canopy cover, suggesting growth in a green light concentrated environment increases green light use efficiency. Each species was also collected from sites differing in their degree of canopy cover and grown under three light treatments (high light, low light, and green light). Photosynthetic efficiency (chlorophyll fluorescence), tissue nitrogen and carbon isotope concentrations were assessed after a short growth period. Growth conditions had little effect on leaf chemistry and monochromatic green light did not significantly degrade photosynthetic efficiency. This study provides the first evidence to date of positive net ‘green light photosynthesis’ in mosses.     

Phylogenetic relationships between Bryum and supposedly closely related genera

Abstract

The phylogeny of the genus Bryum was studied using cladistic analyses under the maximum parsimony criterion of evolution of anatomical and morphological characters. Three analyses were made with 32 Bryum species plus 20 species from genera supposedly closely related to Bryum, and with Amblyodon dealbatus (Sw. ex Hedw.) Bruch & Schimp., Meesia uliginosa Hedw., and Leptostomum macrocarpum (Hedw.) Bach. Pyl., as outgroups. It is here suggested that under earlier systematic concepts the genus Bryum is paraphyletic. A clade with Bryum billarderi Schwägr., B. capillare Hedw., B. donianum Grev., B. russulum Broth. & Geh., Rhodobryum giganteum (Schwägr.) Paris, and R. keniae (Müll. Hal.) Broth. are circumscribed by spathulate stem leaves that are crowded in the stem apex, suggesting that the rosulate species of Bryum are more closely related to Rhodobryum than to the rest of Bryum. Stem leaf costae without stereids and spores that mature in the winter are synapomorphies for a clade with Anomobryum julaceum (P. Gaertn. et al.) Schimp. and Bryum argenteum (Hedw.). The tropical species B. cellulare Hook. and B. flaccum Wilson ex Mitt. appear in a clade with Plagiobryum zieri (Dicks. ex Hedw.) Lindb. and Synthetodontium pringlei Cardot. In one analysis, B. limbatum Müll. Hal., Epipterygium tozeri (Grev.) Lindb., Leptobryum pyriforme (Hedw.) Wilson, and Roellia roellii (Broth. ex Röll) H.A. Crum came out in a clade with Mniobryum atropurpureum (Wahlenb.) I. Hagen, Mnium hornum Hedw., Pohlia cruda (Hedw.) Lindb., P. longicollis (Hedw.) Lindb., and Pseudopohlia didymodontia (Mitt.) A.L.Andrews. It is here suggested that gametophytic features, such as the orientation and anatomy of the stem leaves and the appearance of vegetative propagules, are important for the internal relationships within the studied ingroup, whereas characters related to the sporophyte, especially those of the peristome, may obscure phylogenetic relationships. Most of the subgenera and the sections of Bryum, as defined by earlier authors, appear to be paraphyletic. However, due to the low stability of most clades it is suggested that analyses including anatomical, morphological, and molecular data are needed.     

山东苔藓植物新记录

该研究通过对采自山东的苔藓植物标本进行鉴定,首次发现裂齿藓[ Dichodontium pellucidum (Hedw.) Schimp.]和粗疣藓[ Fauriella tenuis (Mitt.) Cardot]在山东的分布,这也是昂氏藓科(Aongstroemiaceae)裂齿藓属( Dichodontium Schimp.)和粗疣藓属( Fauriella Besch.)的苔藓植物在山东的首次发现。文中还详细描述了裂齿藓和粗疣藓的形态特征,绘制了墨线图,并进行了相应的讨论。     

Spore morphology of some Brachytheciaceae Schimp. species (Bryophyta) from Turkey

The spores of Homalothecium sericeum (Hedw.) Schimp., Brachythecium populeum (Hedw.) Schimp., B. velutinum (Hedw.) Schimp. var. salicinum (Schimp.) Mönk., B. velutinum (Hedw.) Schimp. var. validum C. Jens. and Eurhynchium hians (Hedw.) Sande Lac. were studied by light and scanning electron microscopy for the first time. The apertural region consists of a leptoma in all spores. Two spore types, characterized by their surface ornamentation, are established, reflecting the species taxonomic relationships. While the surface ornamentation is of the insuloid type in Eurhynchium hians, it consists of a granuloid type in Homalothecium sericeum , Brachythecium populeum , B. velutinum . var. salicinum, B. velutinum var. validum. The spore wall of the family Brachyteciaceae includes sclerine (the dinstinction between exine and perine may be difficult to define) and intine. The taxonomy of the genera Brachytecium and are discussed on the basis of their spore morphology.     

Nuovo elenco di muschi Cusiani (Piemonte)

Abstract

New list of mosses in the Cusian woods (Orta Lake. Piedmont). — The author draws up a list of new entities and new places in the Cusian region, in addition to the entities already listed in his previous works, about wood mosses in the region, mentioned in the bibliography. The distinctive characters with reference to the known species and formes are emphasized. The boundaries of the considered region, the different kinds of woods as well as some geomorphologic, geologic and climatic notes have been explained in the previous works, together with a short account about the previous bryological researches that have been carried out in the region, from DE NOTARIS (1805-1877) onwards. New entities listed in the present and in the previous author's works: Pleuridium subulatum (Hedw.) Lindb. var. nurautianum; Oreoweisia Bruntoni (Smith) Milde var. cusiana; Anisothecium rufescens (Smith) Lindb. var. Vertacomorum; Dicranella subulata (Hedw.) Schimp, var. curvata (Hedw.) Rabenh. f. sculerensis; Gyroweisia tenuis (Hedw.) Schimp, var. amenensis; Trichostomum mutabile Bruch De Not. subsp. cuspidatum (Schimp.) Herzog, var. silvaticum; Tortula muralis Hedw. f. incana Sapegin oec. parviseta; Mnium affine Blandow var. minus; Mnium hymenophylloides Hueb. f. ovata; Hedwigia ciliata B.S.G. f. insignis; Plasteurhynchium striatum (Spruce) Fleisch, f. cavernarum Podp. oec. Scalettae; Hygroamblystegium sculerense; Amblystegiella confervoides (Brid.) Loeske var. ciliata; Homalothecium sericeum (Hedw.) B.S.G. f. roncherensis; Brachythecium Starkei B.S.G. var. nemorosum; Brachythecium collinum (Schleich.) B.S.G. f. Cusionis; Brachythecium plumosum (Hedw.) B.S.G. f. minor et f. protilica; Pseudoscleropodium purum (Hedw.) Fleisch, f. integra; Entodon cladorrhizans (Hedw.) C. Mueller f. delicatula; Plagiothecium denticulatum (Hedw.) B.S.G. var. majus (Boulay) Limpr. f. eubinervia; Plagiothecium denticulatum (Hedw.) B.S.G. ssp. laetum (B.S.G.) Meylan var. densum (B.S.G.) Moenk. f. plicata; Plagiothecium denticulatum (Hedw.) B.S.G. f. cultrifolia; Platygyrium repens B.S.G. f. binervia et f. brachyphylla; Hypnum cupressiforme Hedw. ssp. eu-cupressiforme Giac. var. lacunosum Brid. f. denticulata; Loeskeobryum brevirostre (Schwaegr.) Fleisch, f. eudentata.     

甘肃省丛藓科植物新资料

通过对甘肃省金昌市永昌县境内龙首山及周边湿地苔藓植物进行调查鉴定,报道了甘肃省分布的丛藓科(Pottiaceae)1个新记录属——盐土藓属(Pterygoneurum Jur.)和4个新记录种——卵叶盐土藓[P.ovatum(Hedw.)Dix.]、盐土藓[P.subsessile(Brid.)Jur.]、卷叶墙藓[Tortula atrovirens(Smith)Lindb.]和狭叶链齿藓[Desmatodon cernuus(Hueb.)BruchSchimp.]。标本存放于内蒙古大学植物标本馆(HIMC)。     

Observations of spore morphology of some Pottiaceae Schimp. species (Bryophyta) in Turkey

The spores of Syntrichia ruralis (Hedw.) F. Weber and D. Mohr., S. princeps (De Not.) Mitt., S. subulata (Hedw.) F.Weber and D.Mohr var. subulata, S. subulata (Hedw.) F.Weber and D.Mohr var. angustata (Schimp.) J.J. Amann and S. subulata (Hedw.) F.Weber and D.Mohr var. graeffii Warnst. were studied by light and scanning electron microscopy for the first time. The apertural region consists of a leptoma in all spores. All taxa of the family are uniform in their spore morphology. The spores of the five taxa are of granuloid type. The spore wall of the Pottiaceae family includes sclerine (the distinction between exine and perine may be difficult to define) and intine. The taxonomy of the genus Syntrichia is discussed on the basis of its spore morphology.     

Bryophytes from the southeastern Yukon Territory,Canada

One hundred and forty-five taxa of bryophytes are reported from the extreme southeastern Yukon. Eight species of Hepaticae and 13 of mosses represent new records for the Yukon, which are Calypogeia suecica (S. Arnell & Perss.) K. Müll., Chiloscyphus pallescens (Ehrh.) Dum., Conocephalum conicum (L.) Dum., Jamesoniella autumnalis (DC.) Steph., Pellia neesiana (Gott.) Limpr., Ptilidium pulcherrimum (Web.) Hampe, Riccardia palmata (Hedw.) Carruth., Tritomaria exsecta (Schmid.) Schiffn., Amblystegium varium (Hedw.) Lindb., Brachythecium rivulare B.S.G., B. rutabulum (Hedw.) B.S.G., Bryum blindii B.S.G., Didymodon rigidulus Hedw., D. tophaceus (Brid.) Lisa, Drepanocladus trichophyllus (Warnst.) Podp., Hygroamblystegium noterophilum (Sull. & Lesq. ex Sull.) Warnst., Hygrohypnum molle (Hedw.) Loeske, Plagiomnium ciliare (C. Müll.) Kop., P. cuspidatum (Hedw.) Kop., Platydictya minutissimum (Sull. & Lesq. ex Sull.) Crum, and Pylaisiella selwynii (Kindb.) Crum, Steere & Anderson. Many of the other collections represent wide extensions of range within the Yukon Territory.     

New and noteworthy records of mosses from Italian national and regional Parks

Some remarkable mosses, as a result of the study of both recent collections and a review of herbarium specimens, are reported in this paper. They are: Anomodon rugelii (Müll.Hal.) Keissl., new record from southern Italy, a moss very rare in the Mediterranean region and considered threatened in many European countries; Blindia acuta (Hedw.) Bruch & Schimp. and Dichodontium palustre (Dicks.) M. Stech, both new records from Sicily, are very rare mosses in Italy. Moreover, a new locality in Sicily for the little-known species Tortula bolanderi (Lesq. & James) M. Howe is reported.     

Ephemerella readeri Müll. Hal. (Physcomitrella readeri (Müll. Hal.) I.G. Stone & G.A.M. Scott,Funariidae, Bryophyta): a genus and species new to Europe

Abstract

A morphological and molecular analysis of a Physcomitrella, collected from a reservoir margin in the north of England, revealed this to be P. readeri, a species new to Europe. The present study clarifies previous confusion over the taxonomy of P. readeri showing it to be clearly distinct in both sporophytic and gametophytic characters from P. patens and uniform across its world range from England to USA, Japan and Australasia. While phylograms of the ITS1 region from both the Physcomitrella species, Physcomitrium pyriforme (Hedw.) Bruch & Schimp., Enthosthodon attenuatus (Dicks.) Bryhn and Funaria hygrometrica Hedw., place the first two in separate clades, in ITS2 phylograms they occur as sister taxa. This, together with previous genealogical studies on the speciation history of the Physcomitrella–Physcomitrium species complex, and morphology, suggests that generic rank is appropriate for P. readeri. We therefore reinstate the original name Ephemerella readeri Müll. Hal. Recent records at several reservoirs in England indicate that E. readeri may be native to UK, though remarkable congruence in ITS1 with Australian plants also suggests recent arrival as an alternative possibility.     

Bryophytes of the northern Yukon Territory,Canada, collected by A. J. Sharp and others

Two hundred and eight taxa of bryophytes, including two hundred and seven species, are reported from extreme northern Yukon. Five hepatic and eighteen moss taxa represent new records for the Yukon, which areAnastrophyllum hellerianum (Nees) Schust.,Scapania degenii Schiffn. in K. Müll.,Riccardia palmata (Hedw.) Carruth.,Mannia sibirica (K. Müll.) Frye & Clark,Sauteria alpina (Nees) Nees,Sphagnum orientale Savich,Dicranum spadiceum Zett.,Anoectangium aestivum (Hedw.) Mitt.,Barbula coreensis (Card.) Saito,B. platyneura C. Müll. & Kindb.,Pottia obtusifolia C. Müll.,Splachnum vasculosum Hedw.,Bryum acutiforme Limpr. ex Hag.,B. bimum (Brid.) Turn.,B. intermedium (Brid.) Bland.,B. neodamense Itzigs.,Cinclidium latifolium Lindb.,Timmia comata Lindb. & Arn.,Orthothecium acuminatum Bryhn,Cratoneuron arcticum Steere,Drepanocladus brevifolius (Lindb.) Warnst.,D. intermedius (Lindb.) Warnst., andD. lycopodioides (Brid.) Warnst. Many of the other collections represent significant extensions of ranges to the arctic sector of the Yukon Territory.     

Differential proteomics of dehydration and rehydration in bryophytes: evidence towards a common desiccation tolerance mechanism

All bryophytes evolved desiccation tolerance (DT) mechanisms during the invasion of terrestrial habitats by early land plants. Are these DT mechanisms still present in bryophytes that colonize aquatic habitats? The aquatic bryophyte Fontinalis antipyretica Hedw. was subjected to two drying regimes and alterations in protein profiles and sucrose accumulation during dehydration and rehydration were investigated. Results show that during fast dehydration, there is very little variation in protein profiles, and upon rehydration proteins are leaked. On the other hand, slow dehydration induces changes in both dehydration and rehydration protein profiles, being similar to the protein profiles displayed by the terrestrial bryophytes Physcomitrella patens (Hedw.) Bruch and Schimp. and, to what is comparable with Syntrichia ruralis (Hedw.) F. Weber and D. Mohr. During dehydration there was a reduction in proteins associated with photosynthesis and the cytoskeleton, and an associated accumulation of proteins involved in sugar metabolism and plant defence mechanisms. Upon rehydration, protein accumulation patterns return to control values for both photosynthesis and cytoskeleton whereas proteins associated with sugar metabolism and defence proteins remain high. The current results suggest that bryophytes from different ecological adaptations may share common DT mechanisms.     

Recent Bryological Literature, 60

Abstract

Brachythecium dieckii Roell and B. salteri Card. &; Dix. are removed from the synonymy of B. velutinum (Hedw.) B., S. &; G. The two first names belong to the same species, B. dieckii having priority. Brachythecium dieckii has more strongly prorate upper abaxial nerve cells than B. velutinum, it has scattered prorate upper lamina cells, more broadly recurved and more coarsely denticulate leaf margins, and it has more regular, more incrassate alar cells in larger groups that extend further up along the leaf margin than in B. velutinum. B. dieckii is known from central Spain and from the Canary Islands     

Barbula sardoa (Schimp.) J.-P.Frahm,a new name for Barbula convoluta Hedw. var. commutata (Jur.) Husn.

Abstract

Barbula convoluta Hedw. var. commutata (Jur.) Husn. differs from var. convoluta not only by characters such as larger size, darker colour and undulate leaf margins, as mentioned in the literature, but, in addition, by a different transverse section of the stem, different basal laminal cells, different papillae on the leaf surface, a different spore ornamentation and different isozyme systems. It should therefore be regarded as a separate species. In this case, the legitimate name would be Barbula sardoa (Schimp.) J.-P. Frahm, since Barbula convoluta var. sardoa Schimp. is revealed to be an earlier synonym of var. commutata.