North America Non-native Plant

Elymus Tsukushiensis

Botanical name: Elymus tsukushiensis

USDA symbol: ELTS

Habit: grass

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

Elymus tsukushiensis: The Mystery Grass That’s Hard to Pin Down Ever stumbled across a plant name that seems to disappear into the botanical ether? Meet Elymus tsukushiensis, a grass species that’s about as elusive as a gardener’s perfect weather forecast. If you’re reading this hoping to learn everything about this ...

Elymus tsukushiensis: The Mystery Grass That’s Hard to Pin Down

Ever stumbled across a plant name that seems to disappear into the botanical ether? Meet Elymus tsukushiensis, a grass species that’s about as elusive as a gardener’s perfect weather forecast. If you’re reading this hoping to learn everything about this particular grass, well, you’re in for a bit of a mystery ride!

What We Know (Spoiler Alert: It’s Not Much)

Elymus tsukushiensis belongs to the grass family, specifically falling into what botanists call graminoids – basically the fancy term for grasses and grass-like plants. Think of it as part of the extended grass family reunion that includes your lawn grass cousins, sedges, and rushes.

Here’s where things get interesting (and by interesting, I mean frustratingly vague): this particular species is so under-documented that finding reliable information about it is like trying to find a specific blade of grass in a meadow. No widely recognized common name, no clear native range, and virtually no horticultural guidance available.

The Geographic Ghost Story

The geographical distribution of Elymus tsukushiensis remains largely unknown, making it something of a botanical ghost story. Without clear documentation of where this grass naturally occurs, it’s impossible to say whether it might be suitable for your garden or landscape.

Should You Grow It? The Honest Answer

Here’s where I need to be straight with you: with so little information available about Elymus tsukushiensis, it’s really difficult to recommend it for your garden. When a plant species lacks basic horticultural information, you’re essentially gambling with your garden space and time.

Consider these unknowns:

  • Growing requirements and preferred conditions
  • Mature size and growth habits
  • Hardiness zones and climate tolerance
  • Potential benefits to wildlife and pollinators
  • Whether it’s invasive or well-behaved

Better Alternatives: Well-Documented Native Grasses

Instead of wrestling with the mystery that is Elymus tsukushiensis, why not consider some well-documented native grasses that are proven garden performers? Depending on your region, you might explore:

  • Little bluestem (Schizachyrium scoparium) for prairie-style landscapes
  • Buffalo grass (Poaceae dactyloides) for low-maintenance lawns in arid regions
  • Pennsylvania sedge (Carex pensylvanica) for shady woodland gardens
  • Switchgrass (Panicum virgatum) for dramatic height and fall color

The Bottom Line

Sometimes in gardening, as in life, the most honest answer is I don’t know enough to recommend this. Elymus tsukushiensis appears to be one of those botanical mysteries that’s better left to specialized researchers than home gardeners.

If you’re drawn to ornamental grasses (and who isn’t – they’re fantastic!), stick with well-documented species native to your area. Your local native plant society or extension office can point you toward grasses that will thrive in your specific conditions while supporting local wildlife.

After all, gardening should be enjoyable, not a frustrating guessing game. Save the mysteries for your weekend detective novels and choose plants with proven track records for your landscape!

Elymus Tsukushiensis

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 tsukushiensis Honda

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