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Issue: Vol. 474 No. 1: 27 November 2020
Type: Article
Published: 2020-11-27
DOI: 10.11646/phytotaxa.474.1.1
Page range: 1–14
Abstract views: 48
PDF downloaded: 1

Floral geometric morphometrics unveils a new cauliflorous species of Aristolochia (Aristolochiaceae) from the Guiana Shield

Programa de Pós-Graduação em Botânica, Universidade Estadual de Feira de Santana, Av. Transnordestina s.n., CEP: 44036-900, Feira de Santana, Bahia, Brazil; 2Laboratório de Sistemática e Genética Vegetal, Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo-CEUNES, Universidade Federal do Espírito Santo-UFES, Rodovia BR 101 Norte, Km. 60, Bairro Litorâneo, São Mateus, ES, Brasil. CEP 29932-540
Universidad Nacional de Colombia, Facultad de Ciencias, Instituto de Ciencias Naturales, AA 7495, Bogotá, Colombia.
Museum National d´Histoire Naturelle, Direction des Collections, Herbier Plantes Vasculaires, CP 39, 75231 Paris cedex 05, France.
Department of Botany and Plant Pathology, 2082 Cordley Hall, Oregon State University, Corvallis Oregon 97331-2902. U.S.A. Department of Botany, MRC-166, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, U.S.A.
Programa de Pós-Graduação em Botânica, Universidade Estadual de Feira de Santana, Av. Transnordestina s.n., CEP: 44036-900, Feira de Santana, Bahia, Brazil; 2Laboratório de Sistemática e Genética Vegetal, Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo-CEUNES, Universidade Federal do Espírito Santo-UFES, Rodovia BR 101 Norte, Km. 60, Bairro Litorâneo, São Mateus, ES, Brasil. CEP 29932-540
floral morphometry Flora of the Guianas new species Piperales Magnoliids

Abstract

Aristolochia wankeana (Aristolochiaceae), a new species from French Guiana and Guyana, is described and illustrated here. Floral traits, primarily of the shape and size of the perianth limb, examined through a morphometric geometric analysis, are diagnostic to distinguish the new species from its relatives A. cornuta and A. iquitensis. The species belongs to Aristolochia subser. Anthocaulicae, characterized by having extremely short cauliflorous racemes with scale-like, triangular subtending bracts. This is the first study that uses morphometrics for taxonomic purposes in Aristolochia, an approach that becomes promising to solve species complexes in this genus.