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Oak Compendium ★

Oaks of the World

Common Names

Bluff Oak

bluff-oak, bastard white oak

Geographic Range

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South Carolina; Mississipi; Georgia; Florida; Alabama; from 0 to 200 m;

Growth Habit

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to 20-30 m tall; stout ascending branches; broad crown;

Leaves

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7-10 x 3-6 cm; elliptic to oboval; base cuneate, apex rounded, more or less narrow; margin sinuate or with 3-7 shallow, rounded lobes; bright green, hairless above; paler and velutinous but glabrescent beneath except along veins; 4-8 vein pairs; petiole to 3-5 mm, hairless;

Fruits (Acorns)

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acorn oval; solitary or paired; slightly hairy near apex; enclosed for 1/3 or 1/2 in cup; cup subsessile or on a stalk reaching 1.5 cm; scales weakly appressed, grey and smooth; maturing in 1 year;

Hardiness & Habitat

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hardy zone 5-6; prefers rich and moist soils or bluffs, along rivers;

Additional Information

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– Sub-genus Quercus, Section Quercus, Series Stellatae; (however is sometimes confused with Q.nigra, Sub-genus Quercus, section Lobatae , since leaves are remotely resembling); – Threatened (IUCN Red List Category : VU). – Often misidentified as Q.sinuata, but the latter has larger and more pointed buds, darker twigs, deeper cup, and mature leaves glabrous on both sides with deeper sinuses;