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East African Bryophytes, XXI.

Two new species of Telaranea, sect. Tenuifoliae and records on Amazoopsis (Lepidoziaceae) from the Indian Ocean Islands

Acta Botanica Hungarica
Author:
T. Pócs

Telaranea bischleriana sp. nov. is described from the Seychelles and from the eastern coast of Madagascar, distinguished by only two intervening cells between its very dense, rigid, bristle like leaves with two short and quite divergent lobes. Telaranea maorensis sp. nov. from Mayotte Island with monocrurous leaves is similar in appearance to the South American T. pecten (Spruce) Engel et Merr., but differs by its pseudo-dichotomous habit, due to the predominant Frullania type terminal branching, the shorter and wider leaves and lobe cells, monocrurous male and outer female bracts and by its autoecy. New localities of the two African Amazoopsis species are also given.

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Pictolejeunea piconii Pócs is described from the Canaima National Park in Venezuelan Guyana. It differs from the previously known five species by its sharply refracted lobe, by the parallelly elongated cells of free lobule margin, by the broad reniform underleaves of 2–3x stem width with rounded lobes and by its perianth with auriculate wings, fimbriately dentate margin and exserted beak.

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Impatiens nguruensis Pócs is described from the Nguru Mountains, part of the Precambrian chain of isolated crystalline mountains forming the Eastern Arc of Tanzania. It differs from the related Impatiens ukaguruensis Grey-Wilson by its deeper crenulate leaf margin with only 10–15 teeth at each side (around 20 in I. ukaguruensis ), by the narrower dorsal petal with straight lower margin and by the much less incurved spur of the lower petal. It is the second known endemic species of Impatiens in the Nguru Mts.

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Cololejeunea ecuadoriensis and Cololejeunea schusteri are described from Ecuador and from Brazilian Amazonia. C. ecuadoriensis by its filamentous stylus and C. schusteri by its falcate leaves with its first tooth curved down are well separated from all Neotropical species of the genus.

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Cryptobiotic crusts are important part of the mostly open, extreme terrestrial ecosystems. Their main components are the Cyanobacteria, therefore their strategies for survival can be traced down through the investigation of the cyanobacterial components and their different arrangement in the structure of the different crust types. In this study, 10 terricolous and 12 rupicolous types/subtypes were established from the samples collected in 5 continents from deserts to forest areas during the past 6 years. Each type is illustrated and their main cyanobacterial components are enumerated through examples and their survival strategies are analysed.

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The study of certain Lejeuneaceae types from the Geneva Herbarium (Conservatoire et Jardin botaniques de la Ville de Genève, G) resulted in the new synonymy of Drepanolejeunea cambouena Steph. with Drepanolejeunea pentadactyla (Mont.) Steph., that of Lejeunea rodriguezii (Steph.) Steph. with Lejeunea anisophylla Mont. and proved the independent identity of Lejeunea jungneri (Steph.) Steph. Types of some rare species, as Lejeunea angulifolia Mitt. and Lejeunea julacea Steph. were also examined and illustrated. Drepanolejeunea dactylophora (Nees et al.) Schiffn. is new to Africa and L. angulifolia for the Chagos Archipelago and to the Seychelles.

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Bryophytes from the Fiji Islands, VI

The genus Cololejeunea Raddi (Jungermanniopsida), with the description of seven new species

Acta Botanica Hungarica
Author:
T. Pócs

The recent investigation of the Fiji Islands in the Pacific revealed many new records and the known number of Cololejeunea species was raised from 10 to 38. One out of these fell in synonymy and another proved to be a new species. Altogether eight taxa are described here, as new to science: Cololejeunea bifalcata, C. blepharophylla, C. crateris, C. konratii, C. pacifica, C. saroltae, C. schmidtii var. acutepapillosa and C. tuiwawana. The aim of this paper, apart from the description of new species, includes the redescription of Cololejeunea polyantha and the lectotypification of Lejeunea polyantha (on which C. polyantha is based), and to provide a key for all the 43 species recently known from the Fiji Islands. Some new insular records are also added and finally a phytogeographical analysis on the Fijian Cololejeunea flora is made.

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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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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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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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