North America Native Plant

Hybrid Oak

Botanical name: Quercus ×bimundorum

USDA symbol: QUBI2

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Hybrid Oak: A Mysterious Native Tree Worth Understanding Ever stumbled across a plant name that sounds like it belongs in a fantasy novel? Meet the hybrid oak (Quercus ×bimundorum), a native tree that’s as elusive as it sounds. This perennial woody giant represents one of nature’s fascinating experiments in oak ...

Hybrid Oak: A Mysterious Native Tree Worth Understanding

Ever stumbled across a plant name that sounds like it belongs in a fantasy novel? Meet the hybrid oak (Quercus ×bimundorum), a native tree that’s as elusive as it sounds. This perennial woody giant represents one of nature’s fascinating experiments in oak hybridization, though it’s definitely not your typical backyard tree.

What Makes This Oak Special?

The hybrid oak is a native species found in the lower 48 states, specifically documented in Massachusetts and Pennsylvania. As its name suggests, this is a hybrid oak (indicated by the × in its scientific name), meaning it’s the result of two different oak species crossing paths and creating something entirely new. The name bimundorum literally translates to of two worlds, which perfectly captures this tree’s hybrid nature.

Like other oaks, this is a substantial tree that can grow well over 13-16 feet tall, developing the classic single-trunk structure we associate with mature oak trees. Under certain environmental conditions, it might develop a more multi-stemmed or shorter growth form.

Should You Plant a Hybrid Oak?

Here’s where things get interesting – and a bit challenging. This hybrid oak is incredibly rare, with very limited information available about its cultivation, growing requirements, or even its exact appearance. While we know it exists in nature, finding nursery stock or seeds would be like searching for a needle in a haystack.

The Reality Check

If you’re drawn to the idea of growing this mysterious hybrid oak, you’ll likely face some significant hurdles:

  • Extremely limited availability in the nursery trade
  • Lack of detailed growing information
  • Unknown specific growing conditions and care requirements
  • Uncertain hardiness zone information
  • No established propagation methods for home gardeners

Better Alternatives for Your Garden

While the hybrid oak might be fascinating from a botanical standpoint, practical gardeners might want to consider other native oak species that offer similar benefits with much better availability and growing information:

  • White Oak (Quercus alba) – widely available and adaptable
  • Red Oak (Quercus rubra) – fast-growing with beautiful fall color
  • Bur Oak (Quercus macrocarpa) – extremely hardy and drought-tolerant
  • Chestnut Oak (Quercus prinus) – excellent for difficult sites

The Bottom Line

The hybrid oak represents one of nature’s rare botanical curiosities. While it’s undoubtedly an interesting native species, its extreme rarity and lack of cultivation information make it more of a unicorn plant than a practical garden choice. If you’re passionate about native oaks and supporting local ecosystems, you’ll have much better success with well-established native oak species that nurseries actually carry and that have proven track records in home landscapes.

Sometimes the most fascinating plants are the ones we admire from afar while we plant their more accessible cousins in our own backyards. And honestly? Those other native oaks will provide all the wildlife benefits, shade, and natural beauty you’re looking for, with a lot less mystery and a lot more success.

Hybrid Oak

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Hamamelididae

Order

Fagales

Family

Fagaceae Dumort. - Beech family

Genus

Quercus L. - oak

Species

Quercus ×bimundorum Palmer [alba × robur] - hybrid oak

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA