Two Worlds Oak
Quercus bimundorum
Fagaceae · broadleaf deciduous tree · native
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Quercus x bimundorum (Fagaceae) is a hybrid between Q. alba (white oak) and Q. robur (English oak). The best-known selection is 'Crimson Spire', a columnar tree reaching 30 to 40 feet tall with a narrow, upright form. The foliage resembles white oak but with some English oak characteristics.
This hybrid combines the adaptability of English oak with the native vigor of white oak. 'Crimson Spire' is grown for its narrow columnar form, which suits street plantings and tight spaces. It grows in full sun on well-drained soil. Hardy in Zones 4a to 8b.
Quick Facts
Height
30–40 ft
Hardiness
Zone Zones 4a–8b
Origin
Eastern North America (i
Diseases (14)
Ramorum Blight (Sudden Oak Death) Arceuthobium spp. (parasitic plant) Mistletoe abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Armillaria ostoyae Armillaria Root Rot Colletotrichum acutatum complex (C Anthracnose Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Microstroma album Frosty Mildew Ganoderma applanatum Ganoderma Root and Butt Rot Pseudoinonotus dryadeus Inonotus Root and Butt Rot Taphrina spp. Leaf Blister Phoradendron villosum Mistletoe (a True Mistletoe) Neonectria ditissima Nectria Canker Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Inonotus dryophilus White Pocket Rot (Piped Rot)
Pests (14)
Looper Stem Gall Asterolecanium spp. Pit scale Platycotis vittata Oak Treehoppers Bucculatrix albertiella Oak Ribbed Casemaker Phylloxera spp. Oak leaf phylloxera Various (Cynipidae, Cecidomyiidae, Eriophyidae, Psyllidae) Leaf galls Neuroterus saltatorius Jumping Oak Gall Andricus quercuscalifornicus California Gallfly Prionoxystus robiniae Carpenterworm Oak gall wasp Bucculatrix ainsliella Oak skeletonizer Edwardsiana rosae Rose leafhopper Various (Cynipidae, Cecidomyiidae, Eriophyidae) Leaf and twig gall
Cultivars (2)
'Crimson Spire'
Common name: Crimson Spire Oak; Mature height: 45 ft
Hardy to USDA Zone 5
'Crimschmidt'