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Botanical Sciences

versão On-line ISSN 2007-4476versão impressa ISSN 2007-4298


SALAZAR, Gerardo A.; EDQUEN, José D.  e  TRUJILLO, Delsy. Liparis inaudita (Orchidaceae, Malaxidinae), a new species from the Bosque de Protección Alto Mayo, San Martín, Peru. Bot. sci [online]. 2022, vol.100, n.2, pp.506-514.  Epub 22-Mar-2022. ISSN 2007-4476.


During an ongoing inventory of the orchids of the Bosque de Protección Alto Mayo, northern Peru, a population morphologically assignable to Liparis section Decumbentes was found. This is a little-known group restricted to wet montane Andean forests and consists of four species, from which the BPAM populations differs in leaf and labellum morphology.


The features of the plants led us to hypothesize that it represents an unknown species, which can be distinguished morphologically from its congeners.


Liparis section Decumbentes, Liparis sp. nov.

Study site and dates:

Peru, department of San Martín, Rioja province, Pardo Miguel Naranjos district, Bosque de Protección Alto Mayo, sector Venceremos.


The unknown entity was studied in detail using fresh, pressed, and alcohol-preserved specimens. We also compared it to type specimens, other specimens of Liparis section Decumbentes housed in herbaria in Peru and abroad, and with descriptions from specialized literature.


A leaf feature and the unique labellum morphology of the unknown entity permit it to be distinguished clearly from all other species of Liparis section Decumbentes.


The new species shares with L. sessilis the sessile leaf blades and the convex labellum, but differs from it and all other species of the section in its saddle-shaped labellum, which when spread out is narrowly obtrapezoid, with minute basal auricles, laciniate distal margins, and the apex projected into a narrowly triangular lobe.

Palavras-chave : Andes; leaf blade; labellum morphology; Liparis section Decumbentes; wet montane forest.

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