Dirr (1998) states that 'Scanlon' is no longer common in cultivation. In any case there is great confusion as to which is which (Jacobson, 1996). Apparently 'Scanlon' is a sport of ‘Bowhall’ that was considered a superior stable form having reliable fall color, but the two are very similar and 'Scanlon' my have been sold under the name ‘Bowhall’ for a time. 'Scanlon' - compact conical crown, narrow, upright, with strong central leader, 40 × 15 ft (12 × 4.5 m), fall color is yellow-orange to reddish-orange. Frank Schmidt & Sons nursery, Boring, Oregon, introduced in 1966. Hardy to USDA Zone 4 Developed in the 1940s by J. ‘Franksred’) upright branching, oval shape, 45 × 35 ft (14 × 11 m), female, leaves strongly 3-lobed, dark, glossy green, fall foliage is brilliant orange-red to red. nursery, Boring, Oregon, introduced about 2006 (PP16,769). Leaves dark green, fall foliage is brilliant red. ‘Frank Jr.’) broadly pyramidal form, dominant central leader, fast growing, 45 × 30 ft (14 × 10 m). Introduced in about 1961 by Princeton nursery of New Jersey (PP 2116). Hardy to USDA Zone 4b, reportedly better adapted to areas with mild winters and hot summers than other selections.
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