Starting a conservation collection of Sorbus pseudomeinichii

the Catacol Whitebeam


  • Heather McHaffie Royal Botanic Garden Edinburgh
  • Natacha Frachon Royal Botanic Garden Edinburgh
  • Ashley Robertson



There are three endemic Sorbus species on the Isle of Arran in Scotland: Sorbus arranensis, S. pseudofennica and S. pseudomeinichii. The latter is the most recently discovered and is represented in the wild by a single individual. Seed propagation and vegetative propagation by chip budding were initiated for all three species at the Royal Botanic Garden Edinburgh (RBGE). This has been successful and there are now conservation collections of these species growing at RBGE.

Author Biographies

Heather McHaffie, Royal Botanic Garden Edinburgh

Conservation Officer

Natacha Frachon, Royal Botanic Garden Edinburgh



HULL, P. & SMART , G.J.B. (1984). Variation in two Sorbus species endemic to the Isle of Arran, Scotland. Annals of Botany 53, 641–648.

LUSBY, P., WRIGHT, J. & CLARKE, S.J. (1996). Scottish Wild Plants. Edinburgh: HMSO. 117pp.

ROBERTSON, A. (2000). The origin, evolution and conservation of the Arran Sorbus microspecies. University of Edinburgh PhD thesis.

ROBERTSON, A., NEWTON , A.C. & ENNOS, R.A. (2004a). Multiple hybrid origins, genetic diversity and population genetic structure of two endemic Sorbus taxa on the Isle of Arran, Scotland. Molecular Ecology 13, 123–143.

ROBERTSON, A., NEWTON , A.C. & ENNOS, R.A. (2004b). Breeding systems and continuing evolution in the endemic Sorbus taxa on Arran. Heredity 93, 487–495.

ROBERTSON, A., RICH, T.C.G. & ALLEN, A.M. (2010). Hybridization and polyploidy as drivers of continuing evolution and speciation in Sorbus. Molecular Ecology, 19, 1,675–1,690.

ROBERTSON, A. & SYDES, C. (2006). Sorbus pseudomeinichii, a new endemic Sorbus (Rosaceae) microspecies from Arran, Scotland. Watsonia 26, 9–14.

SINGLE, J. & SINGLE, S. (2010). Short note: Good roots matter from day one. Sibbaldia 8, 179–187. Available online:




How to Cite

McHaffie, H., Frachon, N., & Robertson, A. (2011). Starting a conservation collection of Sorbus pseudomeinichii: the Catacol Whitebeam. Sibbaldia: The International Journal of Botanic Garden Horticulture, (9), 171–178.