North America Non-native Plant

Calamagrostis Viridiflavescens

Botanical name: Calamagrostis viridiflavescens

USDA symbol: CAVI28

Habit: grass

Native status: Not native but doesn't reproduce and persist in the wild

Calamagrostis viridiflavescens: The Mystery Grass That Might Not Exist If you’ve stumbled across the name Calamagrostis viridiflavescens in your gardening adventures, you’re not alone in scratching your head. This particular grass species is something of an enigma in the botanical world, and there’s a good chance you might be dealing ...

Calamagrostis viridiflavescens: The Mystery Grass That Might Not Exist

If you’ve stumbled across the name Calamagrostis viridiflavescens in your gardening adventures, you’re not alone in scratching your head. This particular grass species is something of an enigma in the botanical world, and there’s a good chance you might be dealing with a case of mistaken identity.

What We Know (And Don’t Know)

Here’s the straightforward truth: reliable information about Calamagrostis viridiflavescens is practically nonexistent in mainstream botanical databases and gardening resources. While the name follows proper botanical naming conventions, this could indicate several possibilities:

  • It’s an extremely rare species with limited documentation
  • It’s a recently described species that hasn’t made it into popular gardening circles
  • It’s a synonym for another, better-known Calamagrostis species
  • It’s a misidentification or taxonomic name that’s no longer accepted

The Calamagrostis Family: What to Expect

If this plant truly belongs to the Calamagrostis genus (commonly known as reed grasses), you can expect it to be a graminoid—that’s botanist-speak for grass-like. These plants are typically clump-forming perennial grasses that can add wonderful texture and movement to gardens.

Most Calamagrostis species are known for their:

  • Graceful, arching foliage
  • Feathery seed heads that catch the light beautifully
  • Tolerance for various growing conditions
  • Wildlife value for birds and beneficial insects

Before You Plant: Detective Work Required

If you’re considering adding this plant to your garden, pump the brakes for a moment. Here’s what you should do first:

  • Verify the plant’s identity with a local botanist or extension office
  • Check if it might be a more common Calamagrostis species under a different name
  • Research its native status and invasive potential in your area
  • Ensure you’re sourcing from a reputable nursery that can confirm the plant’s identity

Better-Known Alternatives to Consider

If you’re drawn to the idea of growing a Calamagrostis grass, consider these well-documented native options instead:

  • Calamagrostis canadensis (Bluejoint grass) – excellent for wet areas
  • Calamagrostis purpurascens (Purple reedgrass) – beautiful for prairie gardens
  • Calamagrostis stricta (Narrow reedgrass) – perfect for naturalized areas

The Bottom Line

While the mystery surrounding Calamagrostis viridiflavescens is intriguing, it’s not the best candidate for your garden until you can verify exactly what you’re dealing with. The world of native grasses offers plenty of spectacular, well-documented options that will give you reliable results and confirmed ecological benefits.

When in doubt, stick with the tried-and-true native grasses in your area. Your garden—and local wildlife—will thank you for choosing plants with a proven track record of success.

Calamagrostis Viridiflavescens

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

Calamagrostis Adans. - reedgrass

Species

Calamagrostis viridiflavescens (Poir.) Steud.

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