An invalid name. The cultivar is not now known in cultivation under this name. It appears to have been a FBG cultivar and was described as a pale-flowered form of M. x sheldonii with a leaf that much more closely resembled M. grandis than did the other M. x sheldonii. [Cobb, J.L.S. (1984), Bulletin Of The Alpine Garden Society, Vol.52 p.63].

Brough in 1955 refers to raising seedlings of both "the Aberchalder form of M. grandis" and also of M. x sheldonii. [Brough, M. (1955) Bulletin Of The Alpine Garden Society, Vol. 23 p.143].