[2] 'Rosehill' was described as slightly slower growing than its sibling 'Willis', but carrying a heavier crown, with good branching and attractive foliage.
A well-grown tree labelled 'Rosehill', sourced from the Willis Nursery of Kansas and planted in 1960,[1][4] stands in Arnold Arboretum, Massachusetts.
[7] The arboretum's herbarium specimen (00170039), labelled simply Ulmus 'Rosehill' in 1984, was changed in 1985 to U. pumila × U. rubra 'Rose Hill'.
[4] A photograph shows leaves with only about eight vein pairs,[8] fewer than known examples of Ulmus × intermedia,[6] calling into question the identification of 'Rosehill' as a hybrid of this group.
[3] The herbarium specimen, however, shows leaves with on average about 12 vein pairs,[1] more typical of this hybrid group.