North America Native Plant

Jointtail Grass

Botanical name: Mnesithea

USDA symbol: MNESI

Life cycle: perennial

Habit: grass

Native status: Native to Pacific Basin excluding Hawaii  

Jointtail Grass: A Rare Pacific Grass Worth Knowing About If you’ve stumbled across the name jointtail grass in your plant research, you’ve discovered one of the more elusive members of the grass family. Mnesithea, commonly known as jointtail grass, is a perennial grass that calls the Pacific Basin home – ...

Jointtail Grass: A Rare Pacific Grass Worth Knowing About

If you’ve stumbled across the name jointtail grass in your plant research, you’ve discovered one of the more elusive members of the grass family. Mnesithea, commonly known as jointtail grass, is a perennial grass that calls the Pacific Basin home – though you’re unlikely to find it at your local nursery anytime soon.

Where Does Jointtail Grass Come From?

This native grass has a pretty exclusive address: it’s indigenous to the Pacific Basin region, with documented populations in Palau. That’s quite a specific zip code for a plant! Unlike many grasses that have spread far and wide, jointtail grass seems content to stay in its Pacific paradise.

What Makes Jointtail Grass Special?

As a true graminoid (that’s plant-speak for grass-like), Mnesithea belongs to that diverse family of plants that includes not just your typical lawn grasses, but also sedges, rushes, and other grass-like species. Being a perennial means it comes back year after year – always a nice trait in any garden plant.

Should You Grow Jointtail Grass?

Here’s where things get a bit tricky. While jointtail grass isn’t invasive or noxious (as far as we know), it’s also not readily available to most gardeners. Its extremely limited native range means:

  • You’re unlikely to find it for sale commercially
  • It may not be adapted to climates outside its native Pacific Basin habitat
  • Growing requirements are not well-documented

Better Alternatives for Your Garden

Instead of hunting for this rare Pacific grass, consider native grass alternatives that are better suited to your local area. Every region has its own wonderful native grasses that:

  • Support local wildlife and pollinators
  • Are adapted to your local climate
  • Are available from reputable native plant sources
  • Come with established growing guides and care instructions

The Bottom Line on Jointtail Grass

While Mnesithea is certainly an interesting plant from a botanical perspective, it’s more of a nice to know about species than a must-have for your garden plant. Its limited range and lack of availability make it impractical for most gardeners. Your time and garden space are better invested in native grasses from your own region that will thrive in your specific conditions and support your local ecosystem.

If you’re passionate about Pacific Basin flora and happen to live in a similar climate zone, keep an eye out for this grass in botanical collections or specialized native plant sales. But for the rest of us, there are plenty of other native grasses waiting to add texture, movement, and ecological value to our gardens.

Jointtail Grass

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

Mnesithea Kunth - jointtail grass

Species

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