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1 June 2010 Weidmannia (Orchidaceae, Zygopetalinae), a New Genus from the Guayana Highlands
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Abstract

A new genus in the Zygopetalinae is proposed based on morphological, ecological, and molecular data. It differs from Zygosepalum in the cespitose habit, the erect inflorescences, the entire clinandrium, and the subtriangular stipe of the pollinarium. Species assigned to the new genus are generally found on sandstone mountains above 1000 m (“cerros” and “tepuis”) of the Guayana Highlands. In contrast, plants of Zygosepalum s.s. bear arching inflorescences, the flowers have a fimbriate clinandrium, the stipe of the pollinarium is subquadrate, and they are epiphytes in humid tropical forests of the Guayana, generally below 500 m.

© President and Fellows of Harvard College, 2010.
Gustavo A. Romero-González and Germán Carnevali Fernández-Concha "Weidmannia (Orchidaceae, Zygopetalinae), a New Genus from the Guayana Highlands," Harvard Papers in Botany 15(1), 191-194, (1 June 2010). https://doi.org/10.3100/025.015.0110
Published: 1 June 2010
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