This taxon is the result of a cross between A. pseudoplatanus and A. heldreichii, and occurs both in the wild and freely in horticulture. It is a large tree, with habit similar to that of the parents. Leaves deciduous, palmately five-lobed, 10–15 cm across, divided to half of the blade length, upper surface green with deeper green veins, lower surface glaucous or light green; autumn colour yellow. Samaras on long, pendulous racemes; samaras 3–5 cm long. Van Gelderen et al. 1994. Distribution Primarily in the Balkans, where the
A Sycamore look-alike will perhaps not often be the first choice for planting, but in a large arboretum the mass of dark foliage provided by Acer ×pseudoheldreichii could be a useful foil to other trees. It is very hardy, and large specimens are recorded from the Belmont Arboretum, Wageningen, the Netherlands (van Gelderen et al. 1994), Rogów Arboretum (P. Banaszczak, pers. comm. 2007), and Kew, where it was 14 m, 37 cm dbh in 2001 (TROBI). Much more interesting is a darkleaved clone of this hybrid raised from A. heldreichii seeds by Matthew Ridley at Blagdon, Northumberland, and named ‘Blagdon’. It is assumed that the other parent was A. pseudoplatanus ‘Atropurpureum’. The attractively shaped, deeply lobed leaves of the resultant hybrid remain purple-tinged all summer. The original tree is now approximately 8 m tall (M. Ridley, pers. comm. 2007). Grafted plants have been widely distributed from Blagdon, though it is not yet in commerce.