Kindred Spirit Hybrid Oak is an oak

Oak

An oak is a tree or shrub in the genus Quercus , of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus...

 hybrid of Quercus robur

Pedunculate Oak

Quercus robur is commonly known as the Pedunculate Oak or English oak. It is native to most of Europe, and to Anatolia to the Caucasus, and also to parts of North Africa.-Taxonomy:Q...

 x Quercus bicolor

Swamp White Oak

Quercus bicolor, the swamp white oak, is a medium-sized tree of the north central and northeastern mixed forests. It has a very large range, and can survive in a variety of habitats. It grows rapidly and can reach 300 to 350 years...

  thus forming a Quercus x warei. In lay terms this means an Upright English Oak

Pedunculate Oak

Quercus robur is commonly known as the Pedunculate Oak or English oak. It is native to most of Europe, and to Anatolia to the Caucasus, and also to parts of North Africa.-Taxonomy:Q...

 was hybridized with a Swamp White Oak

Swamp White Oak

Quercus bicolor, the swamp white oak, is a medium-sized tree of the north central and northeastern mixed forests. It has a very large range, and can survive in a variety of habitats. It grows rapidly and can reach 300 to 350 years...

 and this tree was one of the progeny

Offspring

In biology, offspring is the product of reproduction, of a new organism produced by one or more parents.Collective offspring may be known as a brood or progeny in a more general way...

. The proper name of this tree

Tree

A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...

 is Quercus x warei 'Nadler' Kindred Spirit. This tree has also been referenced as the 'Nadler' oak. The plant is protected under United States Plant Patent 17604 .