Quercus x heterophylla  (Q. rubra x phellos) Bartram’s oak Fagaceae QUXHE; R, ro, x;

Quercus x heterophylla.Copyright 2012 Bartram’s Garden.bartramsgarden.org. (Accessed 9/2014).

Quercus x heterophylla.Copyright 2012 Bartram’s Garden.bartramsgarden.org. (Accessed 9/2014).

Quercus x heterophylla is a tree, 16 to 20 m tall or more.  It is in the red oak group, 

Leaves stalk 1.2-2.5 cm long; blade 5-8 cm long; lance-shaped, oblong, or elliptical; with 1 to 4 bristle-tipped, shallow lobes; dark green above, paler below, hairy at axils; leaves shape is variable, even on the same tree;

Flowers monoecious, small, males in catkins, females 1-few together.

Fruit acorns. Similar to those of Q. rubra but cap covers more of nut.

Wetland status: NL. 

Frequency in NYC: Rare. 

Quercus x heterophylla.Picture by Andrea Moro.Dipartimento di Biologia, Università di Trieste .Joinville-le-Pont, Arboretum de l'Ecole Du Breuil / Jardin botanique de la Ville de Paris, Francia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License

Quercus x heterophylla.Picture by Andrea Moro.Dipartimento di Biologia, Università di Trieste .Joinville-le-Pont, Arboretum de l’Ecole Du Breuil / Jardin botanique de la Ville de Paris, Francia, – Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License

Origin: Native. 

Habitat: Mixed oak forests, acid soils.