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  • Author or Editor: T. Pócs x
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Drepanolejeunea clavicornis and D. friesii were previously synonymised with D. physaefolia or all of them with D. vesiculosa. In the meantime, Drepanolejeunea vandenberghenii was described from the same species group, as new. In this paper many African specimens are compared with the original descriptions of the above species. Morphological investigations of these and their distributional patterns suggested that the former synonymisation was not justified. In addition, a new, rheophytic species from the same group: Drepanolejeunea vanderpoortenii, is described, as new to science. As a result, from the taxa related to Drepanolejeunea vesiculosa, now six species are recognised from Africa, including its Indian Ocean islands. For these 6 morphotaxa an identification key is provided. The results need confirmation by a future molecular analysis.

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A liverwort collection by Bence Pócs from the Venezuelan Guayana resulted in 31 species of liverworts, including Cololejeunea bencei new to science and C. cardiocarpa, C. obliqua, C. platyneura, C. schusteri, C. verwimpii, Lejeunea pulchra and Plagiochila crispabilis new to Venezuela. The distribution and differentiation of C. schusteri is discussed.

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This paper contains 142 Campylopoideae records from 10 collecting trips of the author with his colleagues in the East African islands. Among the 27 taxa 15 records were new to a certain island, of which 4 were known before only from continental Africa. With these the known number of species on the Indian Ocean islands raises from 30 to 34. Observations on the ecology, distribution and illustrations of most species are also given.

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Reinerantha foliicola was recently described as a new epiphyllous genus and species in the Cololejeuneinae subtribe of the liverwort family Lejeuneaceae, from the montane rainforest region of Ecuador. A second locality of this unusual plant was detected in Venezuela in a rich Andean montane rainforest near Mérida, at an elevation of 2,300 m.

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Examination of about one hundred unidentified Colura specimens resulted in new distributional data of eleven uncommon species, C. australiensis, C. bicornis, C. calyptrifolia, C. crispiloba, C. cristata, C. heimii, C. humbertii, C. imperfecta, C. obesa, C. rhynchophora, C. saroltae and a new species of sect. Colura from Madagascar, C. cataractarum.

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Zoopsidella grahamii sp. nov., related to the Australasian Z. caledonica, is described from the Andes of Central Peru (Oxapampa Province) and southern Ecuador. It is distinguished from Z. caledonica by the smaller plant size, much lower number of lobe cells and different leaf shape, and by the much more elongate perianth mouth lobes consisting of a row of 6-7 narrowly rectangular cells. Riccardia gradsteinii sp. nov., from the same general area in Peru as Z. grahamii, is unique among all dendroid species of the genus by the broad, frilled wings of the main axis, being split into complicatedly bent and strongly crispate scales.

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191 species of hepatics are reported from the Dominican Republic, among these 138 first records; a considerable number of species (34) is new to the West Indies as a whole, eight species and one variety have been known in the West Indies only from the Lesser Antilles, 77 are new to Hispaniola, and 18 new to the Dominican Republic. Notes on ecology, altitudinal and geographical range are provided. 55 additional literature reports are included thus a preliminary first checklist of the hepatics of the Dominican Republic is provided. 246 species of hepatics and Anthocerotae are now known to occur in the Dominican Republic. Drepanolejeunea inchoata var. palmicola Pócs is described as new to science. One new combination, Solenostoma amplexifolia (Hampe ex Lehm.) Váňa et Schäfer-Verwimp, is made.

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Ten taxa are recorded, as new to the bryoflora of Kenya: Andrewsianthus bilobus, Cephaloziella kiaerii, C. transvaalensis, Chenia leptophylla, Cololejeunea minutissima, Colura kilimanjarica, Drepanolejeunea ternatensis, Kurzia irregularis, Lejeunea aloba and Syntrichia pagorum. Further two proved to be new for the whole of Africa, as Microlejeunea globosa and Hennediella stanfordensis. These two were probably introduced into Nairobi township area, similarly to Chenia leptophylla.

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The internal phylogeny and cryptic species of the taxon known as Ptychanthus striatus (Lehm. et Lindenb.) Nees were investigated using morphology as well as phylogenetic studies based on internal transcribed spacer II (ITS2) sequences. Both parsimony analysis and analysis based on Bayesian inference were performed. They both distinguished the African specimens from the Asian-Oceanian specimens, but resolved the specimens differently within these groups. Different alignment methods were compared, and the implied alignment obtained from the direct optimisation by program POY was found to produce a shorter tree in parsimony analysis than the DiAlign or manually improved Clustal alignments. Based on oil body characters and molecular evidence, the African population of Ptychanthus can be distinguished from the Asian-Oceanian one at the species level. The earliest applicable name for the African taxon is Ptychanthus africanus Steph.

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A revision of Neotropical members of the genus Cololejeunea resulted in 69 accepted species after amalgamation of the former genera or subgenera of Aphanolejeunea, Campylolejeunea, Leptocolea, Pedinolejeunea, Physocolea and Taeniolejeunea and the emendation of subgenus Protocolea, restricted to its former sectio Protocolea with Cololejeunea minutissima and related species.After the examination of types the new combinations Cololejeunea gracilis var. linearifolia (R.M. Schuster) Pócs, Cololejeunea subscariosa (Spruce) Pócs and the following new synonymy is established: Physocolea reflexiloba Steph. and Cololejeunea reflexifolia (Steph.) Tixier are new synonyms of Cololejeunea inflectens (Mitt.) Benedix; Lejeunea ensifolia Spruce, Physocolea ensifolia (Spruce) Steph., Physocolea elliptica Steph. and Cololejeunea elliptica (Steph.) S. W. Arnell of Cololejeunea camillii (Lehm.) A. Evans, Cololejeunea trinitensis Tixier of Cololejeunea spruceana Tixier; Cololejeunea katiae Tixier of Cololejeunea lanciloba Steph.; Physocolea chilensis Herzog, Cololejeunea chilensis (Herzog) S. Arnell., Cololejeunea coseguinana L. Clark, Lejeunea turbinifera Spruce, Cololejeunea turbinifera (Spruce) Léon-Yanez, Gradst. et Wegner, Cololejeunea uleana Steph., Physocolea uleana (Steph.) Steph. of Cololejeunea minutissima (Sm.) Steph.; Leptocolea manaosensis Herzog and Cololejeunea manaosensis (Herzog) O. Yano of Cololejeunea subscariosa (Spruce) R. M. Schust.; The latter species is newly lectotypified. Cololejeunea latilobula (Herzog) Tixier, Cololejeunea planissima (Mitt.) Abeyw. and Cololejeunea pseudofloccosa (Horik.) Benedix are new to the Neotropics.An illustrated identification key for all Neotropical Cololejeunea species is presented.

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