Oaks of the World

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  Quercus austrina
Author Small 1903 Fl. S.E. U.S. 353 1903.
Synonyms durandii var. austrina (Small) E.J.Palmer 1945
Local names bluff-oak ; bastard white oak ;
Range South Carolina; Mississipi ; Georgia ; Florida; Alabama ; from 0 to 200 m ;
Growth habit to 20-30 m tall; stout ascending branches; broad crown;
Leaves 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 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;

Bark, twigs and

bark pale and scaly, with broad ridges on old trunks; branchlets dark brown, with prominent, corky, whitish lenticels; buds dark brown, pointed, pubescent, 3-5 mm long;
Hardiness zone, habitat hardy zone 5-6; prefers rich and moist soils or bluffs, along rivers;
Miscellaneous -- 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;

Subspecies and