Veronica hederifolia subsp. hederifolia

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 250

(d) Subsp. hederifolia :

Leaves rather thick, 3- to 5-lobed; middle lobe wider than long. Pedicels (2)3-4 times as long as calyx, usually glabrous except for an adaxial row of rather long hairs. Calyx long-ciliate, otherwise glabrous. Corolla 6-9 mm in diameter, pale blue with white centre. Style 0-7-1 mm. 2/7 = 54. Cultivated ground. Throughout the range of the species.

Subsp. (d) seems to have arisen as an allopolyploid hybrid between subspp. (a) and (c), and has now achieved, as a weed of cultivation, the widest distribution of all the subspecies.