A conspectus of Tephroseris (Asteraceae: Senecioneae) in Europe outside Russia and notes on the decline of the genus

Joachim W Kadereit,Paula Laux,Markus S Dillenberger

doi:10.3372/wi.51.51209

Abstract

Tephroseris is generally considered a difficult genus. Based on the examination of extensive herbarium material and considering the existing literature, we recognize seven species in Europe outside Russia. These are T. palustris, T. integrifolia with subsp. integrifolia, subsp. aurantiaca, subsp. capitata, subsp. maritima, subsp. serpentini and subsp. “tundricola”, T. balbisiana, T. crispa, T. helenitis, T. longifolia and T. papposa. Phylogenetic analysis of ITS and ETS sequences showed that these species fall into three lineages. These are: (1) T. palustris, clearly related to Arctic species of the genus; (2) T. integrifolia; and (3) the remaining species. Molecular dating of the T. integrifolia lineage resulted in a crown group age of 1.76 (0.85–2.87) million years. Possible reasons for taxonomic difficulties in the genus in Europe outside Russia may include its young phylogenetic age and extensive migration and genetic admixture in the Quaternary. The decline of the genus in Europe outside Russia is documented and discussed. We consider it possible that its decline is related to rising global temperatures. Citation: Kadereit J. W., Laux P. & Dillenberger M. S. 2021: A conspectus of Tephroseris (Asteraceae: Senecioneae) in Europe outside Russia and notes on the decline of the genus. – Willdenowia 51: 271–317. Version of record first published online on 3 September 2021 ahead of inclusion in August 2021 issue.

Highlights

Tephroseris (Rchb.) Rchb., estimated to contain approximately 50 species by Nordenstam (1978, 2007), is widely distributed in temperate and arctic parts of the northern hemisphere (Meusel & Jäger 1992)
Koch), with 14 subspecies in addition to the typical subspecies and a number of additional taxa mentioned incidentally. To these must be added T. palustris (L.) Rchb., which was included by Chater & Walters (1976) in S. sect
The following treatment is conservative, and an attempt has been made to evaluate most of the more commonly recognized taxa; it is not, possible to key more than a proportion of the material involved and the treatment must be regarded as very provisional.”

Summary

Introduction

Tephroseris (Rchb.) Rchb., estimated to contain approximately 50 species by Nordenstam (1978, 2007), is widely distributed in temperate and arctic parts of the northern hemisphere (Meusel & Jäger 1992). In Europe, the Flora europaea treatment by Chater & Walters (1976) recognized seven species in the group Koch), with 14 subspecies in addition to the typical subspecies and a number of additional taxa mentioned incidentally. To these must be added T. palustris (L.) Rchb., which was included by Chater & Walters (1976) in S. sect. Is not entirely satisfactory” (our translation), and Chater & Walters (1976) preceded their Flora europaea treatment by noting “An extremely difficult group, in which most of the taxa are very variable. As will be described and discussed in greater detail below, several European red lists noted the decline of essentially all species of the genus The following treatment is conservative, and an attempt has been made to evaluate most of the more commonly recognized taxa; it is not, possible to key more than a proportion of the material involved and the treatment must be regarded as very provisional.” At the same time, as will be described and discussed in greater detail below, several European red lists noted the decline of essentially all species of the genus

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