A new species of Malaxis (Orchidaceae) from Guerrero, Mexico

Salazar, Gerardo A.; Santiago, R. D.

doi:10.1663/0007-196x(2007)59[238:ansomo]2.0.co;2

Cited by 3 publications

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“…Most published work on New World Malaxis s.s. consists of descriptions of new species, both as a result of access to previously unexplored areas and of the greater attention paid to these inconspicuous, little-studied orchids by local taxonomists (e.g. de Barros 1996, Salazar 1990, 1997, Salazar & de Santiago 2007, Dressler 2003, González et al 2008, Carnevali & Noguera 2008. Here we describe an additional new species restricted to water-logged lowland vegetation in north-eastern Argentina and Uruguay.…”

Section: Introductionmentioning

confidence: 85%

A new paludicolous species of Malaxis (Orchidaceae) from Argentina and Uruguay

Salazar

Cabrera

et al. 2014

Phytotaxa

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Malaxis irmae, a new orchid species from the Paraná and Uruguay river basins in northeast Argentina and Uruguay, is described and illustrated. It is similar in size and overall floral morphology to Malaxis cipoensis, a species endemic to upland rocky fields on the Espinhaço range in Southeastern Brazil, which is its closest relative according to a cladistics analysis of nuclear (ITS) and plastid (matK) DNA sequences presented here. However, M. irmae is distinguished from M. cipoensis by inhabiting lowland marshy grasslands, possessing 3−5 long-petiolate leaves per shoot (vs. 2 shortly petiolate leaves), cylindrical raceme (vs. corymbose), pale green flowers (vs. green-orange flowers) and less prominent basal labellum lobules. Malaxis irmae is morphologically also similar to the Brazilian M. warmingii, which differs in its much larger plants and prominent basal labellum lobes.

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