The threatened Dioscorea galiiflora and the identification of Dioscorea triangularis (Dioscoreaceae): Solving a secular imbroglio

FERNANDA RIBEIRO DE MELLO FRAGA; RICARDO SOUSA COUTO; JOÃO MARCELO ALVARENGA BRAGA

doi:10.11646/phytotaxa.391.2.1

Issue: Vol. 391 No. 2: 1 February 2019

Type: Article

Published: 2019-02-01

DOI: 10.11646/phytotaxa.391.2.1

Page range: 93–100

Abstract views: 26

PDF downloaded: 1

**The threatened Dioscorea galiiflora and the identification of Dioscorea triangularis (Dioscoreaceae): Solving a secular imbroglio**

FERNANDA RIBEIRO DE MELLO FRAGA⁺⁻
RICARDO SOUSA COUTO⁺⁻
JOÃO MARCELO ALVARENGA BRAGA⁺⁻

Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, 22460-030, Rio de Janeiro, RJ, Brazil.

Prefeitura da Cidade do Rio de Janeiro, Rua Afonso Cavalcanti, 455, 20211-110, Rio de Janeiro, RJ, Brazil.

Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, 22460-030, Rio de Janeiro, RJ, Brazil.

neotropics Dioscorea moyobambensis species complex yams Monocots

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Abstract

Based on reproductive characters, two taxa are segregated from D. triangularis (Griseb.) R. Knuth: D. piperifolia var. triangularis and D. galiiflora, the latter previously known only by its type collection. Dioscorea galiiflora is here described, new occurrences are reported and its conservation status is assessed. We also provide nomenclatural notes and circumscribe D. piperifolia var. triangularis, D. galiiflora and D. moyobambensis.