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This taxon is the result of a cross between A. davidii and A. pensylvanicum, although the name seems to be being applied somewhat casually to other crosses as well. Tree to 10 m, sparsely branched. Bark blue-green or reddish with conspicuous white stripes. Leaves deciduous, 5–20 × 5–15 cm, palmately three-or five-lobed, the lobes long-acuminate, glabrous or sparsely pubescent below, margins serrate; petiole 2–10 cm long, reddish; autumn colour golden- or orange-yellow. Inflorescence terminal, pendulous racemes, 4–15 cm long. Flowers small. Samaras similar to those of A. davidii, usually short. (van Gelderen et al. 1994; van Gelderen & van Gelderen 1999). Distributed In cultivation only.
USDA Hardiness Zone 5-7
RHS Hardiness Rating H5
This artificial hybrid is of great importance to horticulture and selections of it and related hybrids are extremely popular garden trees, although it should be noted that many can reach at least 10 m in height, with a rounded crown, so they are not subjects for restricted spaces. Acer × conspicuum has occurred on several occasions where the parents grow together, and can be expected to reappear in seedlings of cultivated origin. Several selections ostensibly grown as A. × conspicuum are not attributable to this hybrid and are treated here as unattributed cultivars, namely ‘Candy Stripe’, ‘Siver Cardinal’ and ‘Red Flamingo’. The true parentage of many requires further study. Those convincingly selected from A. × conspicuum are treated below.