Radford, Elizabeth, Michael Dossman, and David Rae. 2003. “The Management of ’Ad Hoc’ Ex Situ Conservation Status Species at the Royal Botanic Garden Edinburgh :: A Review of Options”. Sibbaldia: The International Journal of Botanic Garden Horticulture, no. 1 (October): 43-80. https://doi.org/10.24823/Sibbaldia.2003.155.