North America Native Plant

Foldedleaf Grass

Botanical name: Diectomis fastigiata

USDA symbol: DIFA2

Life cycle: annual

Habit: grass

Native status: Native to Puerto Rico  

Synonyms: Andropogon fastigiata Sw. (ANFA3)   

Foldedleaf Grass: A Mysterious Puerto Rican Native If you’ve stumbled upon the name foldedleaf grass in your quest for native plants, you might find yourself scratching your head – and for good reason! This intriguing grass species, scientifically known as Diectomis fastigiata, is one of those botanical mysteries that keeps ...

Foldedleaf Grass: A Mysterious Puerto Rican Native

If you’ve stumbled upon the name foldedleaf grass in your quest for native plants, you might find yourself scratching your head – and for good reason! This intriguing grass species, scientifically known as Diectomis fastigiata, is one of those botanical mysteries that keeps plant enthusiasts on their toes.

What is Foldedleaf Grass?

Foldedleaf grass belongs to the graminoid family, which simply means it’s part of the grass and grass-like plant group. Think of your typical lawn grass, but with its own unique Puerto Rican twist. The plant has also been known by the scientific synonym Andropogon fastigiata Sw., which gives us a clue that it may have been reclassified over time – a common occurrence in the ever-evolving world of plant taxonomy.

One fascinating aspect of this grass is its dual nature as both an annual and perennial plant, meaning it can complete its life cycle in one year or persist for multiple growing seasons, depending on conditions.

Where Does It Call Home?

Foldedleaf grass is native to the beautiful island of Puerto Rico, where it has adapted to the tropical and subtropical conditions of this Caribbean paradise. As a Puerto Rican endemic, this grass represents part of the unique botanical heritage of the island.

The Challenge for Gardeners

Here’s where things get a bit tricky for us gardening enthusiasts. Despite its intriguing name and native status, foldedleaf grass is remarkably elusive in current horticultural circles. Information about its specific growing requirements, appearance, and garden performance is surprisingly scarce, which presents both challenges and opportunities for adventurous gardeners.

Should You Grow Foldedleaf Grass?

The honest answer is: it depends on your gardening goals and risk tolerance! Here’s what to consider:

  • For Puerto Rican gardeners: If you’re located in Puerto Rico and interested in preserving native plant heritage, this could be an interesting species to seek out and cultivate
  • For mainland gardeners: The lack of readily available information and plant material makes this a challenging choice for most home gardens
  • For plant collectors: This might be exactly the kind of rare, understudied species that appeals to you!

Alternative Native Grasses to Consider

If you’re drawn to the idea of native grasses but foldedleaf grass isn’t readily available in your area, consider these alternatives based on your location:

  • For tropical gardens: Native Panicum species or local sedges
  • For temperate regions: Little bluestem, buffalo grass, or regional native bunch grasses
  • For wetland areas: Native rushes or sedges appropriate to your region

The Bottom Line

Foldedleaf grass represents one of those fascinating botanical puzzle pieces that remind us how much we still have to learn about our native plant communities. While it may not be the easiest choice for most home gardens due to limited availability and information, it serves as a wonderful example of the rich diversity found in Puerto Rico’s native flora.

If you’re determined to grow this species, your best bet would be to connect with local botanical gardens, native plant societies, or university extension programs in Puerto Rico who might have more detailed knowledge about cultivation requirements and seed sources.

Sometimes the most rewarding gardening adventures begin with the plants that make us work a little harder to understand them!

Foldedleaf 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

Diectomis Kunth - foldedleaf grass

Species

Diectomis fastigiata (Sw.) P. Beauv. - foldedleaf grass

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