Abstract

A largely herbarium-based study was undertaken to reassess the status of Elymus athericus (Link) Kerguélen (Sea Couch) and the three coastal hybrids E. x drucei (Stace) Stace, E. x laxus (Fr.) Melderis & D.C. McClint. and E. x obtusiusculus (Lange) Melderis & D.C. McClint. in Scotland. None of the previous records of E. athericus could be confirmed for the country. Verified records of the hybrids are detailed and listed for each relevant vice-county.

Highlights

  • The main aim of this largely herbarium-based study was to determine the validity of records for Elymus athericus (Link) Kerguélen (Sea Couch) and coastal hybrids within Elymus in Scotland

  • The herbarium specimens traced were compared to the records on the Botanical Society of Britain & Ireland (BSBI) Distribution Database (DDb), which forms the basis of maps to be included in a forthcoming new atlas of the flora of Britain and Ireland

  • The presence of E. athericus in Scotland has always been controversial and in this study it has not been identified from any existing specimens

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Summary

Introduction

The main aim of this largely herbarium-based study was to determine the validity of records for Elymus athericus (Link) Kerguélen (Sea Couch) and coastal hybrids within Elymus in Scotland. Stace et al (2015) mapped only one hectad for v.c.74 (presumably accepted) for E. athericus, which must relate to the first record for that vice-county. In contrast to the spread of herbarium specimens, records on the BSBI DDb at the start of the present study (October 2018) showed E. athericus to occur or have occurred in nine Scottish vice-counties.

Results
Conclusion
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