North America Non-native Plant

Rytidosperma Unarede

Botanical name: Rytidosperma unarede

USDA symbol: RYUN

Life cycle: perennial

Habit: grass

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

Synonyms: Danthonia unarede Raoul (DAUN2)   

Rytidosperma unarede: A Mysterious Native Grass Worth Knowing About Ever stumbled across a plant name that sounds like it belongs in a fantasy novel? Meet Rytidosperma unarede, a perennial grass that’s about as elusive as a unicorn in the gardening world. While you probably won’t find this one at your ...

Rytidosperma unarede: A Mysterious Native Grass Worth Knowing About

Ever stumbled across a plant name that sounds like it belongs in a fantasy novel? Meet Rytidosperma unarede, a perennial grass that’s about as elusive as a unicorn in the gardening world. While you probably won’t find this one at your local nursery, it’s worth understanding what makes this mysterious graminoid special.

What Exactly Is Rytidosperma unarede?

Rytidosperma unarede is a perennial grass that belongs to the diverse world of graminoids—that’s fancy talk for grass and grass-like plants. You might also see it listed under its synonym, Danthonia unarede Raoul, named after the French botanist who first described it.

This plant falls into that category of species that botanists know exists but about which gardeners have precious little practical information. It’s like the quiet kid in the back of the class—definitely there, but not saying much about itself.

Where Does It Come From?

The geographic distribution of Rytidosperma unarede remains largely unknown, though the synonym suggests possible connections to New Zealand flora. Without clear documentation of its native range, we’re left piecing together botanical breadcrumbs.

Should You Try Growing It?

Here’s where things get tricky. With so little information available about this species, including its:

  • Growing conditions and requirements
  • Hardiness zones
  • Availability in the nursery trade
  • Conservation status
  • Potential invasiveness

We’d recommend extreme caution before attempting to grow Rytidosperma unarede. The lack of readily available information could indicate this is a rare species that should be left to conservation professionals and botanical gardens.

Better Alternatives for Your Garden

Instead of hunting for this elusive grass, consider these well-documented native alternatives that offer similar grassy textures and ecological benefits:

  • Local native bunch grasses specific to your region
  • Native sedges (Carex species)
  • Regional prairie grasses
  • Native ornamental grasses suited to your climate zone

The Bottom Line

Rytidosperma unarede serves as a perfect reminder that the plant world still holds many mysteries. While our curiosity about unusual species is natural and wonderful, sometimes the most responsible choice is to admire from afar and choose better-understood native plants for our gardens.

If you’re passionate about rare grasses, consider supporting botanical research or conservation organizations that work to understand and protect mysterious species like this one. Your garden will thrive with well-documented natives, and you’ll be contributing to broader conservation efforts at the same time.

Rytidosperma Unarede

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

Rytidosperma Steud. - wallaby grass

Species

Rytidosperma unarede (Raoul) Connor & Edgar

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