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Issue: Vol. 641 No. 4: 21 Mar. 2024
Type: Article
Published: 2024-03-21
DOI: 10.11646/phytotaxa.641.4.3
Page range: 267-276
Abstract views: 40
PDF downloaded: 1

Second-step lectotypification of Stobaea rigida and reassessment of heterotypic synonyms of Berkheya rigida (Asteraceae, Arctotideae)

Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
Department of Plant Sciences and Afromontane Research Unit, University of the Free State, Private Bag X13, Phuthaditjhaba 9866, South Africa
Arctotideae Compositae Gorteriinae nomenclature South Africa taxonomy Eudicots

Abstract

As part of a taxonomic reassessment of species that were classified in Berkheya series Rigidae in the most recent monograph of Berkheya, the type material for Berkheya rigida and its putative heterotypic synonyms is reassessed. The original material for the basionym, Stobaea rigida, is heterospecific. Therefore, a second-step lectotype is designated consistent with predominant usage of the name Berkheya rigida. The name Apuleia rigida and its replacement name Stobaea gaertneri apply to a conspicuously radiate species and are excluded from the synonymy of Berkheya rigida. The morphological variability of Berkheya rigida is discussed.

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