Oaks of the World

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  Quercus arkansana
Author Sarg. 1911
Synonyms arkansana var. caput-rivuli (Ashe pro hybr.) Ashe 1924
caput-rivuli Ashe (pro hybr.) 1923
Local names Arkansas oak; water oak;
Range Arkansas; Southwest Georgia; Northwest Florida; Alabama; Eastern Texas; from 50 to 150m;
Growth habit reaches 18 m high, but most often 6-9 m;
Leaves 5-13 cm long, 2.5-6 cm wide; oboval to rhomboid; margin entire or slightly lobed near apex (rare lobes, weakly pointed); base cuneate; apex rounded; yellow green, glabrous above, paler beneath with axillary tufts; petiole 5-25 mm long, pubescent;
Flowers in spring;
Fruits acorn solitary or paired, 1.2 cm long, globose, sessile or short-stalked; shallow cup enclosing 1/4 to 1/3 of nut;

Bark, twigs and
buds

bark thick, rough, black, deeply furrowed; twigs grey pubescent first, with conspicuous lenticels; terminal bud brown, glabrous, 2-5 mm long;
Hardiness zone, habitat hardy; prefers sandy, rocky, moist and well-drained, lime-free soils; slow growing, short living;
Miscellaneous -- section Lobatae;
-- rare; discovered in Arkansas in 1911;
-- hybridizes with Q.nigra, Q.marilandica, Q.phellos and with Q.incana (=
Q.x venulosa)
Subspecies and
varieties
 
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