North America Native Plant

Mock Bluestem

Botanical name: Euclasta

USDA symbol: EUCLA

Life cycle: perennial

Habit: grass

Native status: Native to Puerto Rico  

Mock Bluestem: A Mysterious Native Grass of Puerto Rico If you’ve stumbled across the name mock bluestem in your search for native Puerto Rican plants, you’ve discovered one of the more enigmatic members of the island’s grass family. This perennial grass, scientifically known as Euclasta, is a true Puerto Rican ...

Mock Bluestem: A Mysterious Native Grass of Puerto Rico

If you’ve stumbled across the name mock bluestem in your search for native Puerto Rican plants, you’ve discovered one of the more enigmatic members of the island’s grass family. This perennial grass, scientifically known as Euclasta, is a true Puerto Rican native that remains something of a botanical mystery to most gardeners.

What is Mock Bluestem?

Mock bluestem belongs to the diverse world of graminoids – that’s the fancy botanical term for grass and grass-like plants. As a member of the grass family, it shares characteristics with its more familiar cousins but maintains its own unique identity as a Puerto Rican endemic species.

This perennial grass has earned its place in the native plant community of Puerto Rico, where it has evolved alongside the island’s unique ecosystem over countless generations.

Where Does Mock Bluestem Grow?

Mock bluestem is exclusively native to Puerto Rico, making it a true island endemic. You won’t find this grass growing naturally anywhere else in the world – it’s as uniquely Puerto Rican as coquí frogs and flamboyán trees.

The Challenge of Growing Mock Bluestem

Here’s where things get interesting (and a bit frustrating for eager gardeners): mock bluestem is one of those plants that hasn’t made it into mainstream horticulture. While we know it’s a native perennial grass, specific information about its growing requirements, appearance, and garden performance remains elusive.

This lack of horticultural information means that growing mock bluestem successfully would likely require:

  • Sourcing seeds or plants from specialized native plant societies or botanical institutions
  • Experimenting with growing conditions typical of Puerto Rican native grasses
  • Patience and willingness to learn through trial and observation

Should You Plant Mock Bluestem?

The decision to grow mock bluestem comes with both excitement and uncertainty. On the positive side, choosing native plants like this grass supports local ecosystems and preserves genetic diversity. Native grasses often provide valuable habitat and food sources for local wildlife, even if we don’t have specific documentation of these benefits for mock bluestem.

However, the lack of readily available plants and growing information makes this a challenging choice for most gardeners. If you’re determined to include this native grass in your landscape, you’ll need to become something of a plant detective, working with local botanical experts and native plant enthusiasts.

Alternative Native Grasses

If you’re interested in incorporating native Puerto Rican grasses into your garden but want something with more established horticultural information, consider exploring other native grass species that are better documented and more readily available through native plant sources.

The Bottom Line

Mock bluestem represents the fascinating world of understudied native plants. While it may not be the easiest choice for your garden, it reminds us that there’s still so much to learn about our native flora. If you’re an adventurous gardener with a passion for botanical exploration, mock bluestem might just be the perfect mystery plant for you to help bring into cultivation.

For most gardeners, though, starting with better-documented native plants and working up to more challenging species like mock bluestem might be the wiser approach. After all, successful native gardening is about building knowledge and experience over time – and mock bluestem will still be there waiting when you’re ready for the challenge.

Mock Bluestem

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

Euclasta Franch. - mock bluestem

Species

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