Which tree is known as the Upright English Oak?

The Upright English Oak is specifically identified as Quercus robur 'Fastigiata'. This cultivar of the English Oak is characterized by its narrow, upright growth habit, distinguishing it from other oak varieties that typically have a broader canopy. The 'Fastigiata' form maintains the classic oak leaf shape but is particularly valued in landscape applications for its space-saving vertical growth, making it suitable for smaller gardens or urban settings where horizontal space is limited.

In contrast, Quercus rubra, known as the Northern Red Oak, is a synonymous species but does not share the 'Fastigiata' growth form or the same characteristics as the Upright English Oak. Robinia pseudoacacia 'Frisia', commonly referred to as the Golden Black Locust, is another species entirely known for its bright yellow foliage but is unrelated to the oak genus. Styrax japonicum, or the Japanese Snowbell, is a flowering tree that does not resemble oaks in structure or form. Thus, identifying Quercus robur 'Fastigiata' as the Upright English Oak reflects an understanding of horticultural classifications and tree morphology.