North America Native Plant

Wildrye

Botanical name: Elymus ×cayouetteorum

USDA symbol: ELCA28

Life cycle: perennial

Habit: grass

Native status: Native to Canada  

Synonyms: ×Agroelymus cayouetteorum B. Boivin (AGCA15)  âš˜  Ã—Agroelymus cayouetteorus B. Boivin, orth. var. (AGCA6)   

Wildrye: A Native Canadian Grass Worth Knowing If you’re passionate about native plants and looking to add authentic Canadian flora to your garden, you might want to get acquainted with Elymus ×cayouetteorum, commonly known as wildrye. This perennial grass represents a fascinating piece of Canada’s natural heritage, though it remains ...

Wildrye: A Native Canadian Grass Worth Knowing

If you’re passionate about native plants and looking to add authentic Canadian flora to your garden, you might want to get acquainted with Elymus ×cayouetteorum, commonly known as wildrye. This perennial grass represents a fascinating piece of Canada’s natural heritage, though it remains somewhat of a botanical mystery in the gardening world.

What Makes This Wildrye Special?

This particular wildrye is a hybrid species (indicated by the × in its scientific name) that’s truly Canadian through and through. As a native grass species, it has evolved to thrive in Canadian conditions, making it potentially valuable for gardeners seeking authentic regional plants.

Like other members of the grass family, this wildrye is a monocot with the characteristic grass-like appearance that can add texture and movement to your landscape. As a perennial, it offers the advantage of returning year after year once established.

Where Does It Call Home?

Wildrye’s native range is quite specific – it’s found naturally in Quebec, making it a true regional specialty. If you’re gardening in or near Quebec, you’re working with a plant that’s perfectly adapted to your local ecosystem.

The Challenge of Growing Wildrye

Here’s where things get a bit tricky – and honestly, quite intriguing for plant enthusiasts. This particular wildrye hybrid is somewhat of a botanical enigma. While we know it exists and where it’s from, detailed growing information is surprisingly scarce in gardening literature.

What we do know:

  • It’s a perennial, so it should return each growing season
  • Being a native Canadian grass, it’s likely adapted to cooler climates
  • As a grass-family plant, it probably prefers full sun to partial shade
  • Native grasses typically prefer well-draining soil

Should You Plant It?

If you can source this wildrye responsibly, it could be an excellent addition to a native plant garden, especially if you’re in Quebec or surrounding areas. Native grasses offer several benefits:

  • They’re adapted to local climate conditions
  • They support local ecosystems and wildlife
  • They typically require less maintenance once established
  • They add natural texture and seasonal interest

However, the limited availability of specific growing information means you’d be somewhat pioneering if you choose to grow this particular species. This could be exciting for the adventurous gardener but might be frustrating for those who prefer detailed care instructions.

Alternative Native Grasses

If you love the idea of native Canadian grasses but want more reliable growing information, consider looking into other well-documented Elymus species or native grasses from your region. Many native plant societies and botanical gardens can provide recommendations for locally appropriate alternatives with more established cultivation practices.

The Bottom Line

Elymus ×cayouetteorum represents the fascinating world of native plant diversity that exists right in our own backyards. While it may not be the easiest plant to research or grow, it offers the reward of connecting with authentic regional flora. If you’re drawn to native plants and enjoy a bit of botanical mystery, this wildrye might just be worth seeking out – with the understanding that you’ll be part of learning how to grow it successfully in garden settings.

Wildrye

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Elymus L. - wildrye

Species

Elymus ×cayouetteorum (B. Boivin) Barkworth [sericeum × sibiricus] - wildrye

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