'Bristol Sunbeam' is a crossing from McMillan 1991 between S. russelliana x 'Sonja' and was described as S. x buckleyi 'Bristol Sunbeam'. The plant was in first instance probably only given to a few people by McMillan himself. (Epiphytes vol. 23, Nr. 91 August 1999).
Limited to 1 item per customer.
Like Christmas cacti.