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Issue: Vol. 781 No. 2: 21 Oct. 2026
Type: Article
Published: 2026-10-21
DOI: 10.11646/phytotaxa.781.2.7
Page range: 177-188
Abstract views: 23
PDF downloaded: 1

Expanding the Malagasy Kalanchoe sect. Trichanthae (K. subg. Calophygia) to include K. eriophylla and description of K. ser. Eriophyllae and K. ser. Trichanthae

Ria Olivier Herbarium; Department of Botany; Nelson Mandela University; P.O. Box 77000; Gqeberha; 6031 South Africa
Eudicots classification glabrous vs hairy Madagascar nomenclature perennial prostrate pseudo-rosulate stoloniferous woody clade

Abstract

Previously, a new status, at the rank of section, as Kalanchoe sect. Trichanthae, based on K. [infragen. unranked] Trichanthae that Alwin Berger validly published in 1930, was published for three species, K. synsepala, K. tetraphylla, and K. berevoensis, which, inter alia, share a similar pseudo-rosulate growth form. The section is included in the Madagascar-endemic K. subg. Calophygia, which was described by Bernard M. Descoings in 2006 and extensively emended in 2023 for the woody clade of the genus. The circumscription of K. sect. Trichanthae is here amplified to include K. eriophylla, one of the earliest species described from Madagascar in the mid-1800s, more than 30 years after it was first collected on the island in the early 1820s. At the rank of series, K. ser. Eriophyllae is published for K. eriophylla and K. ser. Trichanthae is published for the three species to date included in K. sect. Trichanthae. This paper forms part of ongoing studies in the Plakkie family, including in Kalanchoe (Crassulaceae [subfam. Cotyledonoideae] tr. Kalanchoeae).

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How to Cite

Smith, G.F. (2026) Expanding the Malagasy Kalanchoe sect. Trichanthae (K. subg. Calophygia) to include K. eriophylla and description of K. ser. Eriophyllae and K. ser. Trichanthae. Phytotaxa 781 (2): 177–188. https://doi.org/10.11646/phytotaxa.781.2.7