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Article from Bean's Trees and Shrubs Hardy in the British Isles
'Quercus gambelii' from the website Trees and Shrubs Online (treesandshrubsonline.
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A deciduous suckering shrub up to 10 or 15 ft high, or a small tree, with a thick, fissured bark; buds ovoid, with persistent stipules; young shoots covered at first with a pale, rusty down. Leaves of firm texture, obovate or oblong-obovate, 23⁄4 to 43⁄4 in. long, 11⁄4 to 21⁄4 in. wide, obtuse at the apex, narrowed to a roundish base, dark, dull green and almost glabrous above, paler and downy beneath, with three to six pairs of deepish, obtuse, entire lobes on each side; petiole 1⁄2 to 3⁄4 in. long. Fruits ripening the first season, borne on a slender peduncle less than 1 in. long. Acorn ovoid, acute, up to 7⁄8 in. long; cup hemispherical, enclosing about half the acorn; scales thickish, downy, appressed except at the tip.
Native of the Rocky Mountains, USA, at high altitudes; introduced towards the end of the last century. It is perfectly hardy, but of no ornamental value.
Q. alba var. gunnisonii Torr.
Q. gunnisonii (Torr.) Rydb