Article from Bean's Trees and Shrubs Hardy in the British Isles
Recommended citation
'Aesculus × mutabilis' from the website Trees and Shrubs Online (treesandshrubsonline.
A group of hybrids thought to have originated from the crossing of A. discolor var. mollis (q.v. under A. pavia) and A. neglecta or its var. georgiana. The type was a garden tree, first described in 1834. The following forms of the cross are in commerce:
The parentage of this group of hybrids (bringing the nomenclature into conformity with Hardin’s treatment) is A. pavia × A. sylvatica (georgiana). The influence of A. pavia shows in the glandular hairs on the margins of the lateral petals.