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Issue: Vol. 622 No. 5: 3 Nov. 2023
Type: Article
Published: 2023-11-03
DOI: 10.11646/phytotaxa.622.5.2
Page range: 281-297
Abstract views: 268
PDF downloaded: 21

Taxonomic studies in Colombian Picramniaceae (Picramniales): new species of Aenigmanu, Nothotalisia and Picramnia from the Pacific and Magdalena Valley regions

Herbario Universidad de Antioquia (HUA) y Grupo de Estudios Botánicos (GEOBOTA); Instituto de Biología; Facultad de Ciencias Exactas y Naturales; Universidad de Antioquia; A.A; 1226; Medellín; Colombia; Herbario Gabriel Gutiérrez Villegas (MEDEL) y Semillero en estudios taxonómicos de plantas de Colombia; Facultad de Ciencias; Universidad Nacional de Colombia; A.A; 3840; Medellín; Colombia
Herbario Universidad de Antioquia (HUA) y Grupo de Estudios Botánicos (GEOBOTA); Instituto de Biología; Facultad de Ciencias Exactas y Naturales; Universidad de Antioquia; A.A; 1226; Medellín; Colombia; Herbario Gabriel Gutiérrez Villegas (MEDEL) y Semillero en estudios taxonómicos de plantas de Colombia; Facultad de Ciencias; Universidad Nacional de Colombia; A.A; 3840; Medellín; Colombia
Eudicots Endangered Neotropical species karst Neotropical biodiversity Sapindales Simaroubaceae

Abstract

 

Three new species of Picramniaceae from Colombia are described and illustrated; Aenigmanu chococola from the Pacific region is the second species of the previously monotypic genus, known only from the Amazon region. In addition to its allopatric distribution, the new species is mainly recognisable by its wide leaf blades, which are basally convex and commonly apically emarginate at the very tip, and long bracts on the pistillate inflorescences. Nothotalisia karsticola and Picramnia vinacea are from karst areas in the Magdalena Valley; the former is mainly recognisable by its long inflorescences, pistillate inflorescences in racemes, staminate flowers with long petals and anthers apically mucronate, whereas the latter is mainly recognisable by its racemose inflorescences in both staminate and pistillate plants, pedicel length in staminate flowers, filaments shorter than the petals and glabrous fruits. We also include notes about their taxonomic affinities, habitat, geographical distribution, phenology, etymology and conservation status. A key for species of Nothotalisia is provided.

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