Quercus × bimundorum
Two Worlds Oak
Native to (or naturalized in) Oregon:
- Deciduous tree, 30-40 ft (~10-12 m) tall. Leaves simple, alternate, obovate, 7-9 rounded lobes, apex obtuse, base of blade may have ear-like projections (auriculate); petiole 5-10 mm long. Fruit (acorn) ovoid, 1.5-2 cm long.
- Hardy to USDA Zone 4 Apparently a common hybrid in eastern North America for at least 100 years. The hybrid is described by E. J. Palmer [J. Arnold Arboretum 29:18 (1948)].
- There are at least to selections of the hybrid in commerce:
- Crimson Spire™ - (Q. × bimundorum 'Crimschmidt')
- Prairie Stature™ - (Q. × bimundorum 'Midwest')
- bimundorum: Latin, bi, two, and mundus, worlds, hence Two Worlds because it is a hyrid of Q. robur, English Oak, (from the "old world") and Q. alba, White Oak, native to Eastern North America (i.e., the "new world").