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Nouveautés taxonomiques et nomenclaturales dans le genrePterisL. (Pteridaceae) à Madagascar

Authors: France Rakotondrainibe; Alain Jouy;

Nouveautés taxonomiques et nomenclaturales dans le genrePterisL. (Pteridaceae) à Madagascar

Abstract

RESUME Les nouveautes taxonomiques et nomenclaturales presentees dans cet article concernent le genre Pteris L. a Madagascar. Elles completent et amendent les donnees contenues dans la derniere synthese de Roux (2009) et sont exposees sous quatre rubriques : especes nouvelles, synonymies nouvelles, synonymies rejetees et taxons exclus. 1) Quatre especes nouvelles sont decrites et illustrees : Pteris janssenii Rakotondr., sp. nov. dont les frondes sont dimorphes, le limbe 1-penne, a pennes entieres, les pennes proximales non decroissantes et les nervures libres ; P. pseudowoodwardioides Rakotondr., sp. nov. qui se differencie de P. woodwardioides Bory ex Willd. des Mascareignes par des ecailles sur le rhizome etroites, coriaces, brun noir, des pennes petiolulees, des epines costales peu differenciees et une nervation plus densement anastomosee ; P. rasoloheryana Rakotondr., sp. nov., espece lianescente, a limbe 2-penne-pinnatifide a 2-penne-pinnatiseque, avec des costae muriquees sur la face abaxiale, sans...

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