Combinations in Pyrus (Rosaceae) required for inclusion in the second edition of Whitebeams, Rowans and Service Trees, BSBI Handbook No. 14.

Authors

DOI:

https://doi.org/10.33928/bib.2025.07.143

Keywords:

generic delimitation, monophyly, taxonomy, synonymy

Abstract

In preparation for the second edition of Whitebeams, Rowans and Service Trees, BSBI Handbook No. 14., eight new combinations and one new name are provided to establish a complete set of names in Pyrus, covering taxa of Sorbus sensu lato. Additionally, one new combination is proposed for a species of Cotoneaster that is naturalised in Kent.

Author Biographies

  • Michael F. Fay, Royal Botanic Gardens, Kew

    Michael Fay is Senior Research Leader in Conservation Genetics at the Royal Botanic Gardens, Kew. A co-author of Plants of the World (2017), he has worked on whitebeams and their relatives since the 1990s. He also has a keen research interest in British and Irish orchids, and he has been Chair/Co-Chair of the Orchid Specialist Group of IUCN since 2006.

  • Maarten J. M. Christenhusz

    Maarten Christenhusz is a freelance botanist with a wide range of interests in vascular plants. He was the lead author of Plants of the World (2017) and has recently published Uitgestorven (a book in Dutch about plant extinctions in the Anthropocene). 

References

Bateman, R.M., Pridgeon, A.M. & Chase M.W. 1997. Phylogenetics of subtribe Orchidinae (Orchidoideae, Orchidaceae) based on nuclear ITS [internal transcribed spacer] sequences. 2. Infrageneric relationships and reclassification to achieve monophyly of Orchis sensu stricto. Lindleyana 12:113-141.

Christenhusz, M.J.M., Fay, M.F. & Byng, J.W. (eds.). 2018. GLOVAP Nomenclature 1. The Global Flora 4:1-155. Bradford: Plant Gateway.

David, J. 2018. Why are we losing Chionodoxa? Plantsman 17:26-27.

Fay, M.F. & Rich, T.C.G. 2022. Rowans, whitebeams and service trees. Curtis’s Botanical Magazine 39:621-630.

Fryer, J. 2020. Validation of the name Cotoneaster froebelii (Rosaceae). British & Irish Botany 2:259-260. https://doi.org/10.33928/bib.2020.02.259

Green, D. 2024a. A new species of Aria (Rosaceae) from the Wye Valley, Wales. British & Irish Botany 6:1-6. https://doi.org/10.33928/bib.2024.06.001

Green, D. 2024b. Correction: A new species of Aria (Rosaceae) from the Wye Valley, Wales. British & Irish Botany 6:184. https://doi.org/10.33928/bib.2024.06.184

Houston, L. & Rich, T.C.G. 2025. New names in British Sorbus (Rosaceae). British & Irish Botany 7:30-36. https://doi.org/10.33928/bib.2025.07.030

Linnaeus, C. (1753). Species Plantarum, vol. 1. Stockholm: Salvius.

Ma, J.-H., Chen, X., Hou, W.-X., Geng, L.-Y. & Tang, C.-Q. 2023. Plastome phylogenomics of Micromeles (Rosaceae). Phytotaxa 589:179–190.

Miller, P. 1754. The Gardeners Dictionary, Vol. 2. 4th ed. Published by author, London.

POWO. 2025. Plants of the World Online. [online]. [Accessed 10 February 2025]. Available at: <https://powo.science.kew.org/>.

Rich, T.C.G., Houston, L., Robertson, A. & Proctor, M.C.F. 2010. Whitebeams, Rowans and Service Trees of Britain and Ireland. A Monograph of British and Irish Sorbus. B.S.B.I. Handbook No. 14. London: Botanical Society of the British Isles.

Rushforth, K. 2018. The whitebeam problem, and a solution. Phytologia 100:222-247.

Rushforth, K. 2019. Apples, whitebeams and their cousins. Curtis’s Botanical Magazine 36:311-431.

Sennikov, A.N. 2018. Scandosorbus (Rosaceae), a new generic name for Sorbus intermedia and its hybrid. Annales Botanici Fennici 55:321-323.

Sennikov, A.N. & Kurtto, A. 2017. A phylogenetic checklist of Sorbus s.l. (Rosaceae) in Europe. Memoranda Societatis pro Fauna et Flora Fennica 93:1-78.

Stace, C.A. 2010. New Flora of the British Isles. 3rd ed. Cambridge: Cambridge University Press.

Stace, C.A. 2019. New Flora of the British Isles. 4th ed. Middlewood Green, Suffolk: C & M Floristics.

Sun, J., Shi, S., Li, J., Yu, J., Wang, L., Yang, X., Guo, L. & Zhou, S. 2018. Phylogeny of Maleae (Rosaceae) based on multiple chloroplast regions: implications to genera circumscription. BioMed Research International 2018:7627191.

Zhang, S.-D., Jin, J.-J., Chen, S.-Y., Chase, M.W., Soltis, D.E., Li, H.-T, Yang, J.-B., Li, D.-Z. & Yi, T.-S. 2017. Diversification of Rosaceae since the Late Cretaceous based on plastid phylogenomics. New Phytologist 214:1355-1367.

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Published

2025-08-14

Issue

Vol. 7 No. 2 (2025): British & Irish Botany

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Articles

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Copyright (c) 2025 Michael F. Fay; Maarten J. M. Christenhusz

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