North America Non-native Plant

Stipagrostis Pennata Pennata

Botanical name: Stipagrostis pennata pennata

USDA symbol: STPEP

Habit: grass

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

Synonyms: Aristida pennata Trin. (ARPE16)   

Stipagrostis pennata pennata: A Mystery Grass Worth Learning About Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head? Meet Stipagrostis pennata pennata, a grass species that’s as mysterious as it is fascinating. While this particular subspecies doesn’t have a widely recognized common name, it ...

Stipagrostis pennata pennata: A Mystery Grass Worth Learning About

Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head? Meet Stipagrostis pennata pennata, a grass species that’s as mysterious as it is fascinating. While this particular subspecies doesn’t have a widely recognized common name, it belongs to a genus that’s perfectly adapted to some of the world’s most challenging growing conditions.

What Exactly Is Stipagrostis pennata pennata?

This plant is a member of the grass family (Poaceae), and if you’re familiar with botanical naming, you might recognize it by its synonym, Aristida pennata. The double pennata in its name suggests this is a specific subspecies within the larger Stipagrostis pennata group.

Like other members of its genus, this grass is likely adapted to arid conditions, though specific information about this particular subspecies is surprisingly scarce in commonly available gardening resources.

Where Does It Come From?

The geographical distribution of Stipagrostis pennata pennata isn’t well-documented in readily available sources. However, grasses in the Stipagrostis genus are typically found in arid and semi-arid regions around the world.

Should You Plant It in Your Garden?

Here’s where things get a bit tricky. With limited information available about this specific subspecies, it’s difficult to make definitive recommendations about whether this grass belongs in your garden. We don’t have clear data on:

  • Its native status in North America
  • Potential invasive characteristics
  • Specific growing requirements
  • Wildlife and pollinator benefits
  • Hardiness zones

What We Can Infer

Based on characteristics of the Stipagrostis genus, this grass likely:

  • Prefers well-drained, sandy soils
  • Tolerates drought conditions once established
  • Grows in full sun locations
  • May provide some wildlife habitat, particularly for seed-eating birds

A Better Approach for Your Garden

Given the uncertainty surrounding this particular subspecies, you might want to consider well-researched native grass alternatives instead. Native grasses offer several advantages:

  • Proven adaptation to local conditions
  • Known benefits for local wildlife
  • Established growing guidelines
  • Support for local ecosystems

Consider reaching out to your local native plant society or extension office for recommendations on native grasses that would thrive in your specific region.

The Takeaway

Stipagrostis pennata pennata serves as a reminder that the plant world still holds mysteries, even in our well-connected age. While this grass might have its place somewhere in the gardening world, the lack of readily available information suggests it’s not a mainstream choice for most gardeners.

If you’re determined to learn more about this specific grass, consider contacting botanical gardens, university extension programs, or specialized grass societies. They might have access to more detailed information about its characteristics and appropriate growing conditions.

Sometimes the most interesting gardening discoveries come from the plants that make us ask more questions than they answer!

Stipagrostis Pennata Pennata

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

Stipagrostis Nees

Species

Stipagrostis pennata (Trin.) De Winter

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