North America Non-native Plant

Celtica Gigantea

Botanical name: Celtica gigantea

USDA symbol: CEGI3

Habit: grass

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

Synonyms: Stipa gigantea Link (STGI2)   

The Mysterious Celtica gigantea: A Grass in Need of Clarity If you’ve stumbled across the name Celtica gigantea in your plant research, you’re not alone in scratching your head. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, as it exists in a sort of taxonomic ...

The Mysterious Celtica gigantea: A Grass in Need of Clarity

If you’ve stumbled across the name Celtica gigantea in your plant research, you’re not alone in scratching your head. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, as it exists in a sort of taxonomic limbo that makes it challenging to provide definitive growing advice.

What We Know (And Don’t Know)

Celtica gigantea is classified as a graminoid – that’s botanist-speak for a grass or grass-like plant. This group includes not just true grasses, but also sedges, rushes, and their relatives. The plant has a recorded synonym of Stipa gigantea Link, which hints at a possible connection to ornamental feather grasses, but the exact relationship remains unclear.

Unfortunately, that’s where our concrete knowledge hits a wall. The common name, native range, and most other essential growing characteristics remain unknown or undefined in available botanical databases.

The Geographic Mystery

The geographical distribution of Celtica gigantea is currently unknown, making it impossible to determine where this plant naturally occurs or whether it would be suitable for your local ecosystem.

Should You Try to Grow It?

Here’s where things get tricky. Without reliable information about this plant’s:

  • Native status
  • Growing requirements
  • Hardiness zones
  • Mature size
  • Invasive potential

It’s nearly impossible to recommend whether you should plant it or how to care for it successfully.

A Word of Caution

When encountering plants with unclear or disputed botanical names, it’s wise to proceed with caution. You might inadvertently introduce an invasive species or struggle to provide proper care for a plant whose needs you can’t research.

Better Alternatives

If you’re drawn to ornamental grasses (which this plant likely is, based on its classification), consider these well-documented native alternatives instead:

  • Research native grasses in your specific region
  • Consult with local native plant societies
  • Visit botanical gardens to see established grass specimens
  • Choose plants with clear botanical names and established growing guides

The Bottom Line

While Celtica gigantea might sound intriguing, the lack of reliable information makes it a risky choice for home gardeners. Your time and garden space are better invested in well-documented native plants that will thrive in your specific conditions while supporting local wildlife.

If you’re determined to learn more about this mysterious grass, consider reaching out to botanical institutions or taxonomic experts who might have additional insights into its current classification and status.

Celtica Gigantea

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

Celtica F.M. Vázquez & Barkworth

Species

Celtica gigantea (Link) F.M. Vazquez & Barkworth

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