Conservatoire et Jardin botaniques de la Ville de Geneva

Genève, Switzerland

Conservatoire et Jardin botaniques de la Ville de Geneva

Genève, Switzerland
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Giralt M.,Rovira i Virgili University | Clerc P.,Conservatoire et Jardin Botaniques de la Ville de Geneva
Lichenologist | Year: 2011

The study of the type and additional material of Buellia andicola, B. hypophana and B. reagens has shown that these taxa are conspecific with B. thiopoliza. Buellia thiopoliza is a muscicolous species growing at middle to high altitudes in the mountains of both hemispheres. It is easily recognized by its K+ purple-red yellow pigment mainly concentrated in the hypothecium, and by the presence of xanthones in the thallus and the apothecial tissues. The new combination Tetramelas thiopolizus is proposed. A key to all known Tetramelas species is included. The also muscicolous Buellia hypoleuca is reduced to synonymy with Phaeorrhiza sareptana var. sphaerocarpa. © 2011 British Lichen Society.

Ferreira G.E.,Federal University of Rio Grande do Sul | Waechter J.L.,Federal University of Rio Grande do Sul | Chautems A.,Conservatoire et Jardin Botaniques de la Ville de Geneva
Systematic Botany | Year: 2014

In this paper we describe and illustrate Sinningia ramboi (Gesneriaceae), a new species occurring on rocky outcrops in the upper parts of the canyons cutting the plateau of high altitude grasslands in Rio Grande do Sul, Brazil. This new species bears some similarity to S. polyantha, S. nivalis, and S. douglasii, but is readily distinguished by opposite leaves and a much shorter main axis of the inflorescence. Ecological and distributional data, as well as a key to distinguish these related species, are also presented. © Copyright 2014 by the American Society of Plant Taxonomists.

Truong C.,Conservatoire et Jardin Botaniques de la Ville de Geneva | Clerc P.,Conservatoire et Jardin Botaniques de la Ville de Geneva
Lichenologist | Year: 2016

Usnea is a cosmopolitan genus of lichen-forming Ascomycota (Parmeliaceae, Lecanorales). This hyperdiverse genus remains poorly known, especially in tropical regions, and recent efforts have been made to clarify the species concepts and describe the diversity of species. We describe five new species from tropical South America based on morphological and chemical features supported by molecular data from the ITS rDNA, nuLSU, RPB1 and Mcm7 markers. Usnea clerciana is a Galapagos endemic characterized by inflated branches holding elongated tubercles, excavate soralia and/or apothecia. Usnea aranea and U. subaranea share inflated branches with numerous papillae and a loose arachnoid medulla, but differ in the minute and irregular soralia in U. aranea, that are circular and excavate in U. subaranea. Usnea rubriglabrata and U. subglabrata are characterized by inflated branches with excavate soralia, with a reddish cortex pigmentation in U. rubriglabrata that is lacking in U. subglabrata. Usnea aranea, U. rubriglabrata, U. subaranea and U. subglabrata are so far endemic to continental South America; the three former species are closely related and cluster in a highly supported clade, characterized by species distributed in the tropical Andes. New records for the region are provided and U. moreliana is resurrected, corresponding to the valid name for U. rubricornuta. © 2016 British Lichen Society.

Price M.J.,Conservatoire et Jardin Botaniques de la Ville de Geneva
Candollea | Year: 2012

PRICE, M. J. (2012). Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G). Candollea 67:153-179. In English, English and French abstracts. One of the most significant bryophyte collections from Paraguay is that of the Frenchman Benedict (Benjamin) Balansa. His collections were distributed to, amongst other institutions, B, BM, G, H-BR, L, NY and PC. In Geneva, Balansa collections can be found in the historical herbaria of Boissier, Reuter-Barbey, Barbey-Boissier and the non G-DC De Candolle collection which were all incorporated into the municipal herbarium (G) of the Conservatoire et Jardin botaniques de la Ville de Geneve. The French bryologist Emile Bescherelle worked on the majority of the Balansa moss collections from Paraguay, describing 73 new species from amongst this material. With the purchase of Bescherelle's herbarium by the BM, Balansa's original Paraguay specimens came to reside there. A total of 390 specimens are present in G for 158 Balansa collection numbers, including 22 specimens for 15 previously unpublished Balansa numbers. The 158 collection numbers and 390 specimens in G cover 88 specific and infraspecific names that represent 67 currently accepted taxa and eight nomina nuda. Of the 390 specimens, 160 are types including 3 lectotypes, 28 isolectotypes, 19 isotypes and 110 syntypes. For each taxonomic entry, the place of publication, the collection number, current name, and for the types the type status and typification, if found, are provided. A complete list of the published Balansa collection numbers for the Paraguay mosses, including their current name, the name under which they were published and the place of publication, is also given herein.

Callmander M.W.,Conservatoire et Jardin botaniques de la Ville de Geneva | Buerki S.,Natural History Museum in London
Candollea | Year: 2016

Two new species of Benstonea Callm. & Buerki (Pandanaceae) are described from Sabah (Borneo, Malaysia). Benstonea fortuita Callm. & Buerki is only known from a small patch of forest in the southern tip of Crocker Range in the southwest of the state. It is diagnosed by its subacaulescent habit, its leaves abruptly attenuate at the apex and narrowing towards the base, and its solitary globose syncarp on a short peduncle. Benstonea serpentinica Callm. & Buerki is endemic to the ultramafic substrate of Mt. Silam in eastern part of the state ; it is diagnosed by its lateral plurisyncarpic infructescence, its peduncle covered with prophylls at base, and its stout acuminate style. Discussions on the morphological and molecular phylogenetic affinities of the new species are provided. Finally, both new species are assessed as "Critically Endangered" following IUCN Red List Categories and Criteria.

Perret M.,Conservatoire et Jardin botaniques de la Ville de Geneva | Chautems A.,Conservatoire et Jardin botaniques de la Ville de Geneva | De Araujo A.O.,Federal University of ABC | Salamin N.,University of Lausanne | Salamin N.,Swiss Institute of Bioinformatics
Botanical Journal of the Linnean Society | Year: 2013

Gesneriaceae are represented in the New World (NW) by a major clade (c. 1000 species) currently recognized as subfamily Gesnerioideae. Radiation of this group occurred in all biomes of tropical America and was accompanied by extensive phenotypic and ecological diversification. Here we performed phylogenetic analyses using DNA sequences from three plastid loci to reconstruct the evolutionary history of Gesnerioideae and to investigate its relationship with other lineages of Gesneriaceae and Lamiales. Our molecular data confirm the inclusion of the South Pacific Coronanthereae and the Old World (OW) monotypic genus Titanotrichum in Gesnerioideae and the sister-group relationship of this subfamily to the rest of the OW Gesneriaceae. Calceolariaceae and the NW genera Peltanthera and Sanango appeared successively sister to Gesneriaceae, whereas Cubitanthus, which has been previously assigned to Gesneriaceae, is shown to be related to Linderniaceae. Based on molecular dating and biogeographical reconstruction analyses, we suggest that ancestors of Gesneriaceae originated in South America during the Late Cretaceous. Distribution of Gesneriaceae in the Palaeotropics and Australasia was inferred as resulting from two independent long-distance dispersals during the Eocene and Oligocene, respectively. In a short time span starting at 34Mya, ancestors of Gesnerioideae colonized several Neotropical regions including the tropical Andes, Brazilian Atlantic forest, cerrado, Central America and the West Indies. Subsequent diversification within these areas occurred largely in situ and was particularly extensive in the mountainous systems of the Andes, Central America and the Brazilian Atlantic forest. Only two radiations account for 90% of the diversity of Gesneriaceae in the Brazilian Atlantic forest, whereas half of the species richness in the northern Andes and Central America originated during the last 10 Myr from a single radiation. © 2012 The Linnean Society of London.

Price M.J.,Conservatoire et Jardin botaniques de la Ville de Geneva | Ellis L.T.,Natural History Museum in London
Journal of Bryology | Year: 2011

A lectotype for Mnium chrysocomum Hedw. (; Breutelia chrysocoma (Hedw.) Lindb.) is designated herein. The presence of Schwägrichen's writing on the herbarium sheet for this taxon in G and the confusion of the name with Bartramia arcuata Sw. and Mnium arcuatum Dicks. ex With. necessitated the correct designation of the nomenclatural type. The protologue, single herbarium sheet for M. chrysocomum in the Hedwig-Schwägrichen collection (G [G00040056]), the cited earlier illustrations of this entity and specimens in the herbaria of Turner (BM) and Dickson (BM) were taken into consideration to determine the most appropriate material for typification. The original sheet for M. chrysocomum in the Hedwig-Schwägrichen collection (G [G00040056]) contains material that possibly originated from the Dickson herbarium (BM) and was probably used by Hedwig for his 1801 description, along with Dickson's own description of the plant, to produce his protologue for M. chrysocomum in Species muscorum frondosorum. However, one of the four entities on sheet G00040056 is of unknown origin, and its inclusion on the sheet may postdate the publication of the species. It is clearly desirable to designate a lectotype specimen for M. chrysocomum from among the remaining plants. Sheet G00040056 is labelled in the hand of Schwägrichen, although in this case the material itself is annotated by Schwägrichen as being that of Hedwig. The issue of herbarium sheets for taxa described by Hedwig, but apparently labelled and annotated by Schwägrichen, is discussed herein. © British Bryological Society 2011.

Jeanmonod D.,Conservatoire et Jardin Botaniques de la Ville de Geneva
Condor | Year: 2010

The Litardière herbarium (deposited in G) contains many types that have previously been overlooked. The aim of this work was to identify all the new Corsican taxa then to extract all the type specimens from Corsica present in that herbarium and reported by Litardière and other botanists. 97 new Corsican taxa have been identified, and for 91 taxa, 135 type specimens (including duplicates) were found. This type material has been carefully typified as 36 holo-, 49 lecto-, 2 isolecto- and 47 syntypes. 45 taxa were described by R. de Litardière himself, 30 by K. H. Zahn (for Hieracium L.), 9 by J. L. van Soest (for Taraxacum F. H. Wigg.) and 13 by other botanists (J. Arènes, J. M. C. Arvet-Touvet, J. Gamisans, R. Maire, K. Ronniger, G. Rouy, A. Saint-Yves and T. G. Yuncker). These taxa belong to 20 families and 33 genera, but about the half (48) belong to Asteraceae, and are essentially species from Taraxacum and Hieracium. © CONSERVATOIRE ET JARDIN BOTANIQUES DE GENÈVE 2010.

Truong C.,Conservatoire et Jardin Botaniques de la Ville de Geneva | Clerc P.,Faculte Des Science Of Luniversite De
Lichenologist | Year: 2012

In tropical South America (Venezuela, Colombia, Ecuador, Peru, Bolivia and Brazil), we investigated the diversity of Usnea species with a pigmented, C+ yellow medulla. Four species are treated: the sorediate U. ceratina and U. entoviolata, the latter being new for South America, and the non-sorediate U. cristatula and U. flavorubescens, the latter being newly described here. A detailed description is provided for each species together with an identification key. Copyright © British Lichen Society 2012.

Ellis L.T.,Natural History Museum in London | Price M.J.,Conservatoire et Jardin botaniques de la Ville de Geneva
Journal of Bryology | Year: 2012

A lectotype for Gymnostomum pennatum Hedw. [=Schistostega pennata (Hedw.) F.Weber & D.Mohr] is selected herein. This entity was first described by Dickson (1785) as Mnium osmundaceum Dicks. before being ascribed to Hedwig (1801) under the name Gymnostomum pennatum. Potential type material from G (Hedwig-Schwägrichen collection) as well as earlier collections in BM (Herb. Dickson) and K (Herb. Lightfoot) were examined and a lectotype was selected for this early moss name from amongst the extant material. © British Bryological Society 2012.

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