Area Botanica

Santiago, Chile

Area Botanica

Santiago, Chile
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Cuvertino J.,University of Santiago de Chile | Ardiles V.,Area Botanica | Osorio F.,Austral University of Chile | Romero X.,Andrés Bello University
Ciencia e Investigacion Agraria | Year: 2012

Bryological knowledge in Chile is incomplete. With the aim of making a contribution to a better understanding of the geographic distribution of these species and encourage bryological studies and the conservation of these plants in the country, the results of floristic investigations are presented. Nineteen national, regional and provincial records for 17 species of bryophytes are provided based on revision of specimens and overlooked literature. The ranges of six species are expanded. In addition, the site of the original collection of one taxon (Barbula austrogracilis Dus.) is corrected, and a second specimen is verified.

Cialdella A.M.,Institute Botanica Darwinion | Munoz-Schick M.,Area Botanica | Morrone O.,Institute Botanica Darwinion
Darwiniana | Year: 2013

Nassella is an American genus which, according to its current circumscription, includes about 116 species, distributed from Canada to Argentina and Chile. It is characterized by its florets with the lemma conspicuously convolute, with an apical conspicuous or inconspicuous crown, and the palea shorter than the lemma; furthermore, the lemma presents a distinctive epidermal pattern. The aim of this work is to provide a synopsis of the 99 species of Nassella which grow in southern South America, comprising Argentina, Bolivia, southern Brasil, Chile, Paraguay and Uruguay. A key to identify the species, mainly based on floret characters, is given. For each species, the current synonyms, geographic distribution, phenology, observations, and illustrations are presented. Nassella barbinodis is accepted and, Nassella linearifolia is a new synonym of Nassella caespitosa. Lectotypes are here designated for the following taxa: Danthonia nardoides, Piptochaetium collinum, P. gibbum, P. laevissimum, Stipa arechavaletae, S. barbinodis, S. breviculmis, S. calchaquia, S. carettei, S. clarazii var. bulbosa, S. curicoana, S. debilis var. papillosa, S. duriuscula, S. hispida, S. hyalina, S. julietii, S. longiglumis, S. macrathera, S. manicata var. media, S. mendocina, S. pratensis, S. pseudopampagrandensis, S. rupestris, S. tenuis, S. trachysperma, S. trichocaulos, and S. uspallatensis. A neotype is designated for S. filiculmis.

Boedeker C.,Leiden University | Ramirez M.E.,Area Botanica | Nelson W.A.,NIWA - National Institute of Water and Atmospheric Research
Phycologia | Year: 2010

Wittrockiella lyallii is a poorly known green macroalga that has been regarded as endemic to southern New Zealand. A herbarium specimen from southern Chile was discovered that conforms to the description of W. lyallii. Subsequently, it was realised that the South American species Cladophoropsis brachyartra is morphologically and ecologically equivalent to W. lyallii. Sequences of three ribosomal genes, including the internal transcribed spacer, from material collected in Chile and New Zealand are identical, suggesting recent long-distance dispersal from New Zealand to South America. The synonymisation of C. brachyartra with W. lyallii is presented here. Furthermore, the resulting disjunct distribution of the species is discussed in the light of sea surface temperatures, habitat availability in the Southern Ocean and winter sea ice extent during the last glacial maximum.

Ramirez M.E.,Area Botanica | Nunez J.D.,University of the Sea | Ocampo E.H.,University of the Sea | Matula C.V.,University of the Sea | And 3 more authors.
New Zealand Journal of Botany | Year: 2012

Schizymenia dubyi (Chauvin ex Duby) J. Agardh is a red alga of the order Nemastomatales that is native to Europe, Asia and Oceania. The first specimen of this seaweed from the Argentinian coast was collected in the Chapadmalal intertidal wave-cut platform (38°12'S, 57°40'W) in September 2008. Taxonomic identification of the species was made on the basis of vegetative and reproductive characters and confirmed by DNA sequence analysis of the rbcL gene. The S. dubyi samples collected in the field were represented by foliose gametophytes as well as crustose tetrasporophytes. The gametophytes were distributed in patches of c. 50% coverage of the analysed quadrants (n=20). Gametophyte abundance was 3.1±2.5 (mean±SD) plants per quadrant (0.04 m2). All these were fertile females. Molecular results placed the specimens from Argentina within the S. dubyi clade, closely related to S. dubyi from Japan and France. © 2012 The Royal Society of New Zealand.

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