North America Non-native Plant

Kyasuma Grass

Botanical name: Pennisetum pedicellatum unispiculum

USDA symbol: PEPEU

Life cycle: annual

Habit: grass

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Kyasuma Grass: A Mysterious Annual Grass Worth Understanding Ever heard of Kyasuma grass? Don’t worry if you haven’t – you’re not alone! Pennisetum pedicellatum unispiculum, commonly known as Kyasuma grass, is one of those plants that exists in the shadows of the gardening world. This annual grass has found its ...

Kyasuma Grass: A Mysterious Annual Grass Worth Understanding

Ever heard of Kyasuma grass? Don’t worry if you haven’t – you’re not alone! Pennisetum pedicellatum unispiculum, commonly known as Kyasuma grass, is one of those plants that exists in the shadows of the gardening world. This annual grass has found its way to Florida, but there’s still quite a bit of mystery surrounding this particular species.

What Exactly Is Kyasuma Grass?

Kyasuma grass belongs to the Pennisetum genus, which includes many ornamental fountain grasses that gardeners love. As an annual grass, it completes its entire life cycle – from seed to flower to seed again – within a single growing season. This means you’ll need to replant it each year if you want to keep it in your garden.

Being part of the grass family (Poaceae), Kyasuma grass shares characteristics with other grasses: narrow leaves, hollow stems, and small flowers arranged in distinctive seed heads. However, the specific details about its appearance and growth habits remain largely undocumented in readily available sources.

Where Does It Grow?

Currently, Kyasuma grass is documented as growing in Florida within the United States. As a non-native species that has been introduced and now reproduces on its own in the wild, it has managed to establish itself in the Sunshine State’s diverse ecosystems.

Should You Plant Kyasuma Grass?

Here’s where things get interesting – and a bit complicated. While Kyasuma grass isn’t currently listed as invasive or noxious, the limited information available makes it difficult to give definitive growing advice. As a responsible gardener, you might want to consider some factors:

  • Its non-native status means it may not provide the same ecological benefits as native grasses
  • Limited documentation makes it hard to predict how it might behave in different garden settings
  • Annual nature means ongoing replanting costs and effort

Native Alternatives to Consider

Instead of Kyasuma grass, Florida gardeners might want to explore native grass options that offer similar ornamental value while supporting local ecosystems:

  • Wiregrass (Aristida stricta) – A beautiful native bunch grass
  • Florida Gamagrass (Tripsacum floridanum) – Excellent for wildlife habitat
  • Chalky Bluestem (Andropogon glomeratus) – Stunning fall colors
  • Sand Cordgrass (Spartina bakeri) – Perfect for coastal areas

The Bottom Line on Kyasuma Grass

Kyasuma grass represents one of those fascinating plant mysteries that remind us how much we still don’t know about the natural world. While it’s established itself in Florida and doesn’t appear to be causing major problems, the lack of detailed information makes it a bit of a wild card for home gardeners.

If you’re drawn to ornamental grasses, you’ll likely find more success and satisfaction with well-documented native species that support local wildlife and are adapted to your specific growing conditions. These alternatives offer the beauty you’re seeking while contributing positively to your local ecosystem.

Sometimes the most responsible gardening choice is to appreciate the mystery while choosing the known quantity – especially when that known quantity happens to be a native plant perfectly suited to your area!

Kyasuma 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

Pennisetum Rich. ex Pers. - fountaingrass

Species

Pennisetum pedicellatum Trin. - Kyasuma grass

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