North America Non-native Plant

Ischaemum Rugosum Var. Segetum

Botanical name: Ischaemum rugosum var. segetum

USDA symbol: ISRUS

Habit: grass

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

The Mystery Grass: Ischaemum rugosum var. segetum Ever stumbled across a plant name that seems to have vanished into the botanical ether? Meet Ischaemum rugosum var. segetum, a grass variety that’s more enigma than garden staple. If you’re scratching your head wondering what this plant is all about, you’re not ...

The Mystery Grass: Ischaemum rugosum var. segetum

Ever stumbled across a plant name that seems to have vanished into the botanical ether? Meet Ischaemum rugosum var. segetum, a grass variety that’s more enigma than garden staple. If you’re scratching your head wondering what this plant is all about, you’re not alone – this particular variety has managed to keep a remarkably low profile in the gardening world.

What We Know (And What We Don’t)

Here’s what we can say for certain: Ischaemum rugosum var. segetum belongs to the graminoid family, meaning it’s a grass or grass-like plant. Beyond that basic classification, this variety has left botanists and gardeners with more questions than answers.

The lack of readily available information about this plant raises some important red flags for home gardeners. Without knowing its:

  • Native range and origin
  • Growth habits and potential size
  • Environmental requirements
  • Invasive potential
  • Ecological impact

Why the Mystery Matters

You might wonder why we’re even talking about a plant with so little available information. The truth is, obscure varieties like this one highlight an important principle in responsible gardening: know before you grow.

When plant information is scarce or unclear, it’s usually best to err on the side of caution. Unknown grasses can sometimes:

  • Become unexpectedly invasive
  • Outcompete native species
  • Require very specific growing conditions
  • Provide little ecological value

A Better Path Forward

Instead of taking a gamble on this mysterious grass, consider exploring well-documented native grass alternatives that offer proven benefits for your garden and local ecosystem. Native grasses typically provide:

  • Reliable growth patterns and requirements
  • Support for local wildlife and pollinators
  • Adaptation to your local climate
  • Lower maintenance needs

The Takeaway

While Ischaemum rugosum var. segetum might sound intriguing, the lack of available cultivation and ecological information makes it a risky choice for home gardeners. Sometimes the most responsible gardening decision is knowing when to pass on a plant – especially when there are so many wonderful, well-documented native alternatives waiting to thrive in your landscape.

If you’re determined to learn more about this variety, consult with local botanical experts, extension services, or native plant societies who might have access to specialized databases or regional knowledge that isn’t widely available online.

Ischaemum Rugosum Var. Segetum

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

Ischaemum L. - murainagrass

Species

Ischaemum rugosum Salisb. - ribbed murainagrass

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