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francaisPolyscias bernardiana Lowry & Callm., une nouvelle espece facilement reconnaissable du centre-est de Madagascar, incluant le site minier d’Ambatovy et plusieurs zones protegees, est decrite en l’honneur de Luciano Bernardi (1920–2001), un explorateur-naturaliste du 20e siecle qui a plus que tout autre botaniste contribue a notre connaissance de la famille des Araliaceae de l’ocean Indien. Cette nouvelle espece ressemble a Polyscias duplicata (Thouars ex Baill.) Lowry & G.M. Plunkett de Madagascar et des iles Comores par son port arborescent monocaule couronne par un mouchet terminal de grandes feuilles entourant une inflorescence globuleuse, et par ses fleurs et ses fruits munis de carpelles et de styles au nombre de 8–10(–12), mais en differe par un pedicelle articule (vs non articule chez P. duplicata) et depourvu de folioles auxiliaires (par rapport a une deuxieme foliole souvent inseree a l’aisselle des folioles principales de P. duplicata). Polyscias bernardiana est illustre par des dessins au trait et des photos en couleur, et une evaluation du risque d’extinction est fournie sur la base des criteres de la Liste rouge de l’UICN, qui indique un etat de conservation de «Preoccupation mineure». EnglishPolyscias bernardiana Lowry & Callm., an easily recognized new species from east-central Madagascar, including the Ambatovy mine site and several protected areas, is described in honor of Luciano Bernardi (1920–2001), a 20th century explorer-naturalist who has contributed more to our knowledge of Indian Ocean Araliaceae than any other botanist. This new species most closely resembles Polyscias duplicata (Thouars ex Baill.) Lowry & G.M. Plunkett from Madagascar and the Comoro Islands in forming monocaulous trees with a terminal cluster of large leaves surrounding a globose inflorescence, and in having flowers and fruits with 8–10(–12) carpels and styles, but differs in having an articulated pedicel (vs. unarticulated in P. duplicata) and lacking auxiliary leaflets (vs. a second leaflet often inserted in the axil of the main leaflets in P. duplicata). Polyscias bernardiana is illustrated by line drawings and color photos, and a risk of extinction assessment is provided based on the IUCN Red List criteria, which indicates a conservation status of “Least Concern”.
[SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy
[SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy
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