B. U508

Has also been referred to in trade as B. ‘Côtes de Castillon’, B. ‘Cote de Castillon’ and The Unnamed Giant.

Additional information from Jacky Duruisseau, 2009: "It was brought back by Henri Laporte from the Kuala Lumpur Orchid Garen (no Kuala Lumpur Botanical as I told you in 1995. Henri shared of it with AFABEGO (Association Francoise de Amateur de Begonias) members. He called it 'Cote de Castillon' and all here grow it with this name. Cote de Castillon is a wine and Henri is a wine grower in the Castillon area. When he retired from being an electricity teacher; the red color of U508 inspired him to give it that name... which is of corse not recognized."

• Classification: Unknown
• Plant Type: Rhizomatous
• Origin: Europe, France
• Date of Origin: 2005