1787 E. Darwin et al. tr. C. Linnaeus et al. I. 13 Perianth one-leaved.
1875 9 17 The singular one-leaved ash, Fraxinus anomala.
2001 26 July 19/1 Forma diversifolia is a curious tree, often called the one-leaved ash, because the foliage is reduced to one or sometimes two large, rounded leaflets up to 20cm in length on a long leaf stalk.