North America Native Plant

Hybrid Willow

Botanical name: Salix ×princepsourayi

USDA symbol: SAPR7

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Hybrid Willow: A Rare Native Tree for Colorado Gardens If you’re a Colorado gardener looking to add native trees to your landscape, you might be intrigued by the hybrid willow (Salix ×princepsourayi). This native tree species represents an interesting piece of Colorado’s botanical heritage, though it’s not your typical garden ...

Hybrid Willow: A Rare Native Tree for Colorado Gardens

If you’re a Colorado gardener looking to add native trees to your landscape, you might be intrigued by the hybrid willow (Salix ×princepsourayi). This native tree species represents an interesting piece of Colorado’s botanical heritage, though it’s not your typical garden center find.

What Makes This Willow Special?

The hybrid willow is exactly what its name suggests – a naturally occurring cross between two willow species. The × in its botanical name Salix ×princepsourayi is the telltale sign that this is a hybrid. As a perennial woody plant, this tree typically grows as a single-stemmed specimen that can reach heights greater than 13-16 feet, though environmental conditions may sometimes result in a shorter, multi-stemmed growth form.

Where You’ll Find This Native

This hybrid willow is native to the lower 48 states, but its distribution appears to be quite limited. Currently, it’s documented as growing in Colorado, making it a true regional specialty for Rocky Mountain gardeners.

Should You Plant This Hybrid Willow?

Here’s where things get interesting – and a bit challenging. While this hybrid willow is undoubtedly a native species worthy of consideration, its extremely limited distribution suggests it may be quite rare. This rarity presents both an opportunity and a responsibility for gardeners.

The Garden Reality Check

Let’s be honest: finding this specific hybrid willow for your garden might be like searching for a needle in a haystack. Its limited range and what appears to be restricted availability mean you’re unlikely to stumble across it at your local nursery. However, if you’re passionate about growing truly local natives and happen to come across responsibly sourced material, it could be a fascinating addition to the right landscape.

General Willow Growing Tips

While specific growing information for this hybrid is limited, willows as a group share some common preferences:

  • Most willows love moisture and thrive near water sources
  • They generally prefer full sun to partial shade
  • Willows are typically fast-growing once established
  • They’re often quite cold-hardy, which suits Colorado’s climate
  • Many willows can tolerate wet soils that other trees struggle with

Landscape Considerations

If you’re fortunate enough to grow this hybrid willow, it would likely work well in naturalized areas, near water features, or as part of a native plant restoration project. Given its tree-like growth habit, it could serve as a specimen plant or be incorporated into native tree groupings.

The Bottom Line

While the hybrid willow represents an intriguing piece of Colorado’s native plant diversity, its rarity and limited availability make it more of a botanical curiosity than a practical garden choice for most gardeners. If you’re interested in supporting native willows in your landscape, you might have better luck with more widely available native willow species that share similar environmental preferences and provide comparable benefits to local wildlife.

For those determined to work with truly local genetics, consider connecting with native plant societies or botanical organizations in Colorado – they might be your best bet for learning more about this elusive hybrid and whether responsibly sourced material might be available for conservation-minded gardeners.

Hybrid Willow

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Salicales

Family

Salicaceae Mirb. - Willow family

Genus

Salix L. - willow

Species

Salix ×princeps-ourayi L. Kelso [glauca × monticola] - hybrid willow

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