North America Native Plant

Lassen County Bluegrass

Botanical name: Poa ×limosa

USDA symbol: POLI13

Life cycle: perennial

Habit: grass

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Poa ×fibrata Swallen (pro sp.) (POFI)  âš˜  Poa fibrata Swallen, database artifact (POFI13)   

Lassen County Bluegrass: A Lesser-Known Native Grass Worth Knowing About Meet Lassen County bluegrass (Poa ×limosa), one of those native grasses that flies under the radar but deserves a moment in the spotlight. This perennial grass might not be the showiest plant in your garden, but it’s got that quiet, ...

Lassen County Bluegrass: A Lesser-Known Native Grass Worth Knowing About

Meet Lassen County bluegrass (Poa ×limosa), one of those native grasses that flies under the radar but deserves a moment in the spotlight. This perennial grass might not be the showiest plant in your garden, but it’s got that quiet, dependable charm that native plant enthusiasts have come to appreciate.

What Makes This Grass Special?

The little × in its scientific name is your first clue that this isn’t your average grass – it’s actually a natural hybrid between two Poa species. Think of it as nature’s own plant breeding experiment that happened long before humans got into the game. This cross has created something uniquely adapted to specific regions of western North America.

You might also see this grass listed under its synonyms Poa fibrata or Poa ×fibrata, which can make tracking down information about it a bit like a botanical treasure hunt.

Where Does It Call Home?

Lassen County bluegrass is a true North American native, with its natural range spanning both Canada and the United States. You’ll find it growing wild in:

  • Alberta and Saskatchewan in Canada
  • British Columbia
  • California
  • Oregon

This distribution tells us it’s adapted to a range of western climates, from the cooler Canadian provinces down to the more temperate regions of California and Oregon.

Should You Grow It in Your Garden?

Here’s where things get a bit tricky. While Lassen County bluegrass is undoubtedly a worthy native species, it’s not exactly what you’d call a common garden center find. This hybrid grass seems to prefer staying in its natural habitats rather than making the jump to cultivation.

If you’re lucky enough to live within its native range and can source it responsibly, it could be a wonderful addition to naturalistic landscapes or native grass gardens. As a perennial, it offers the staying power that makes native plants so valuable for sustainable landscaping.

The Reality Check

Let’s be honest – finding Lassen County bluegrass for your garden might be more challenging than growing it. This isn’t a plant you’ll typically find at your local nursery, and detailed growing instructions are scarce. It’s one of those species that’s better known to botanists than to gardeners.

If you’re drawn to the idea of native grasses in your landscape (and you should be!), you might have better luck with more readily available alternatives like:

  • Other native Poa species in your region
  • Native bunchgrasses suited to your area
  • Locally-adapted grass species recommended by native plant societies

Why Native Grasses Matter

Even if Lassen County bluegrass isn’t destined for your garden, it represents something important. Native grasses like this one are the unsung heroes of healthy ecosystems. They provide habitat, prevent erosion, and support the intricate web of life that makes natural areas thrive.

While this particular grass is wind-pollinated (so it won’t be attracting butterflies to your garden), it likely plays important ecological roles in its native habitats that we’re only beginning to understand.

The Bottom Line

Lassen County bluegrass is one of those fascinating native plants that reminds us how much we still have to learn about our local flora. While it might not become your next garden star, knowing about species like this helps us appreciate the incredible diversity of native plants in North America.

If you’re passionate about native gardening in the western regions where this grass naturally occurs, keep an eye out for it on nature walks and consider supporting organizations that work to preserve native grassland habitats. Sometimes the best way to grow a plant is to protect the places where it already thrives.

Lassen County Bluegrass

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

Poa L. - bluegrass

Species

Poa ×limosa Scribn. & T.A. Williams (pro sp.) [pratensis × secunda] - Lassen County bluegrass

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