Quercus macrocarpa Mich

Eastern USA; to 1000 m and more; introduced in Europe in 1795;

20 m tall (may reach 30 m); crown spreading; stout trunk 0.6-1.2 m in diameter;

10-15 (30) x 5-13 cm; oblong; narrower near midblade; apex rounded; base cuneate; 5-9 deep lobes; lustrous green above; greyish tomentose beneath; 4-5 vein pairs; petiole 1.5-2.5 cm long;

pistillate and staminate flowers in early spring;

acorn 2.5-5 cm long; oval; pubescent at apex; stout peduncle 1-2 cm long; cup hairy, deep (enclosing 1/2 or more of nut), purplish, 2 cm in diameter; cotyledons distinct; maturing in 1 year;

hardy; all types of soils, including calcareous ones; reaches 150 years old;

– A. Camus : n° 279 ; – Sub-genus Quercus, Section Quercus, Subsection Prinoideae; – Related to Q.bicolor ; – Hybridizes with : Q. alba (= x bebbiana), michauxii (= x byarsii), muehlenbergii ( = x deamii), stellata (= x guadalupensis), lyrata (= x megaleia), bicolor (= x schuettei) ; – OOTW reports hybrid: Q. × andrewsii (Q. macrocarpa × Q. × undulata)