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North America Non-native Plant

Arrhenatherum Kotschyi

Arrhenatherum kotschyi: The Mystery Grass Worth Investigating If you’ve stumbled upon the name Arrhenatherum kotschyi in your botanical wanderings, you’ve discovered one of gardening’s little mysteries. This grass species sits quietly in the shadows of its more famous cousin, Arrhenatherum elatius (tall oat-grass), leaving many gardeners scratching their heads and ...

Arrhenatherum kotschyi: The Mystery Grass Worth Investigating

If you’ve stumbled upon the name Arrhenatherum kotschyi in your botanical wanderings, you’ve discovered one of gardening’s little mysteries. This grass species sits quietly in the shadows of its more famous cousin, Arrhenatherum elatius (tall oat-grass), leaving many gardeners scratching their heads and wondering: What exactly is this plant?

What We Know About This Elusive Grass

Arrhenatherum kotschyi belongs to the Poaceae family, making it a true grass rather than a grass-like impostor. You might also encounter it listed under the synonym Arrhenatherum kotschyii Boiss., which is simply an alternate spelling of the same plant. Beyond these basic botanical facts, this species remains something of an enigma in the gardening world.

The Information Gap Challenge

Here’s where things get interesting (and a bit frustrating): reliable information about Arrhenatherum kotschyi is surprisingly scarce. Unlike many popular garden grasses that have been extensively studied and cultivated, this species appears to fly under the radar of most horticultural references and native plant databases.

This lack of information could mean several things:

  • It may be a regional species with very limited natural distribution
  • It could be a rarely cultivated ornamental grass
  • The species might have specific habitat requirements that make it uncommon
  • It may be primarily of academic interest to botanists rather than gardeners

Should You Plant It?

Given the mystery surrounding this grass, we’d recommend proceeding with caution. Without clear information about its native status, growth habits, or potential invasiveness, it’s difficult to make a solid recommendation either way.

If you’re determined to explore this botanical puzzle, consider these alternatives that are well-documented and garden-worthy:

  • Native bunch grasses suitable for your region
  • Well-behaved ornamental grasses with known characteristics
  • Local native plant society recommendations for grass species

The Bottom Line

Sometimes in the plant world, mystery isn’t always a good thing—especially when you’re planning a garden. While Arrhenatherum kotschyi might intrigue the botanically curious, the lack of reliable growing information makes it a risky choice for most gardeners.

If you encounter this grass in the wild or have access to seeds, consider reaching out to your local botanical garden, native plant society, or university extension office. They might be interested in learning more about this elusive species, and you could contribute to expanding our knowledge of regional flora.

Until more information becomes available, you’re probably better off sticking with grasses that come with a full instruction manual. Your garden (and your peace of mind) will thank you for it!

Arrhenatherum Kotschyi

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

Arrhenatherum P. Beauv. - oatgrass

Species

Arrhenatherum kotschyi Boiss.

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