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San Isidro, Argentina

Nicola M.V.,Institute Botanica Darwinion IBODA
Gayana - Botanica | Year: 2012

The taxonomic position of a new family of flowering plants recently described, Pycnanthaceae Ravenna, is here discussed; as a result of comparison of type material, this new taxon is placed in the synonymy of the genus Malaxis within the Orchidaceae. A list of species of Malaxis growing in Argentina is provided, as well as a key to differentiate them. © 2012, Universidad de Concepcion. All rights reserved.

Ospina J.C.,Institute Botanica Darwinion IBODA | Pozner R.E.,Institute Botanica Darwinion IBODA
Phytotaxa | Year: 2013

Renealmia elianae (Zingiberaceae), a new species from the Central Andes of Colombia is described and illustrated. Renealmia elianae is morphologically close to R. puberula, differing by the inflorescence position, corolla size, labellum texture, surface and color, and size of the epigynous glands. © 2013 Magnolia Press.

Gomiz N.E.,University of Buenos Aires | Torretta J.P.,University of Buenos Aires | Torretta J.P.,CONICET | Aliscioni S.S.,University of Buenos Aires | And 2 more authors.
Anales del Jardin Botanico de Madrid | Year: 2014

The genus Zygostates Lindl. (Orchidaceae) comprises about 20 species of small Neotropical epiphytic plants, represented in its southernmost limit by the species Z. alleniana. In this paper, we studied morphological and anatomical floral characteristics of this species related to pollination mechanism. We confirmed the presence of the unicellular trichomes on the base of the lip and side lobes secreting oil, constituting a trichomal elaiophore. The oil is deposited beneath the cuticle at the apex of the trichomes forming small blisters. The oil could represent a reward for the species Lophopedia nigrispinis, which would be a potential pollinator of Z. alleniana in a natural area within the geographic range of this plant species. Moreover, we prove that the reconfiguration of the pollinaruim is due to the dehydration of the walls cell. This reconfiguration could favor cross-pollination mechanism already described for other species of the family Orchidaceae. Finally, we discuss the floral characters present in Z. alleniana with closely related species.

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