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Issue: Vol. 619 No. 1: 5 Oct. 2023
Type: Article
Published: 2023-10-05
DOI: 10.11646/phytotaxa.619.1.8
Page range: 117-122
Abstract views: 95
PDF downloaded: 10

Exochaenium natalense (Gentianaceae), a reinstated taxon endemic to KwaZulu-Natal, South Africa

Institute of Biology; University of Neuchâtel; Rue Emile-Argand 11; 2000 Neuchâtel; Switzerland
Custodians of Rare and Endangered Wildflowers (CREW) Programme; South African National Biodiversity Institute; South Africa
Custodians of Rare and Endangered Wildflowers (CREW) Programme; South African National Biodiversity Institute; South Africa
Bews Herbarium; Centre for Functional Biodiversity; School of Life Sciences; University of KwaZulu-Natal; Pietermaritzburg; South Africa
Eudicots KwaZulu-Natal Pondoland South africa summer rainfall region taxonomy

Abstract

Based on morphological and ecological considerations, Belmontia natalensis (syn. Exochaenium grande var. homostylum) is reinstated as Exochaenium natalense (Gentianaceae). It only occurs in a section of the coastal region of the Eastern Cape (Pondoland) and southern KwaZulu-Natal provinces, South Africa. Exochaenium natalense differs from E. grande, the only other South African Exochaenium taxon, by having smaller flowers (corolla diameter < 2 cm vs > 3 cm) with a different colour (white vs cream-salmon or yellow). Because the type material of E. natalense consists of two sheets, a lectotype is designated.

 

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