Non-native Plants

Arrhenatherum Kotschyi

Arrhenatherum kotschyi

USDA symbol: ARKO80

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? Arrhenatherum ...

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 is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Arrhenatherum kotschyi is also known as:

Arrhenatherum kotschyii , orth. var. | USDA symbol: ARKO3

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
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