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Buenos Aires, Argentina

O'Leary N.,Institute Botnica Darwinion | Mulgura M.E.,Institute Botnica Darwinion
Annals of the Missouri Botanical Garden | Year: 2012

A taxonomic revision of the genus Phyla Lour. is provided. Phyla is a small genus in Verbenaceae, placed in the tribe Lantaneae and represented by five species and three varieties. Four species are found only in the Americas, and one, P. nodiflora (L.) Greene, is found worldwide in tropical and temperate areas. Detailed morphological descriptions are given for each taxon, as well as a key for their identification, illustrations, synonymy, distribution, selected specimens, and discussion about the relationships among closely related taxa. Cryptocalyx nepetifolia Benth. is lectotypified, and one new combination is proposed, P. nodiflora var. minor (Hook.) N. O'Leary & Múlgura.

Lizarazu M.A.,Institute Botnica Darwinion | De Agrasar Z.E.R.,Institute Botnica Darwinion | Vega A.S.,University of Buenos Aires
Systematic Botany | Year: 2011

A new species of Merostachys from the Bolivian Yungas, Merostachys yungasensis, is described and illustrated. Merostachys yungasensis is compared to other taxa distributed in Argentina, Bolivia, Paraguay, and Peru, in a table based on morphological characters. Additional micromorphological characters of foliage leaf blade and cauline epidermis are included. In Argentina two species are confirmed: M. claussenii and M. multiramea; the latter species constitutes a new report for this country and is excluded from Paraguay. The specific epithet of M. claussenii is emended, and a lectotype is here designated. Two new synonyms are recognized for M. claussenii and its presence is confirmed from Paraguay after an analysis of previous reports based on misidentifications. The taxa are illustrated. A key for the identification of the species, based on vegetative and reproductive characters, is also provided. © Copyright 2011 by the American Society of Plant Taxonomists.

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