Compare sources for Quercus × × brittonii

Pennsylvania, New York, New Jersey ;

shrub or small tree;

9-10 cm, oboval to broadly oboval; leathery; base cuneate; 1-3 lobes each side; dark green above with hairs on veins; beneath grey-green, with yellowish tomentum denser on veins and at axils; splendid at fall; leaves lately deciduous;

hardy;

Resources:
Britton’s Oak (Hybrid Quercus × brittonii)
http://oaks.of.the.world.free.fr/quercus_brittonii.htm

– Section Lobatae; – Discovered in 1888 on Staten Island, New York;