North America Native Plant

Grisebach’s Tribisee

Botanical name: Lasiacis grisebachii

USDA symbol: LAGR4

Life cycle: perennial

Habit: vine

Native status: Native to Puerto Rico  

Synonyms: Panicum grisebachii Nash (PAGR3)   

Grisebach’s Tribisee: A Lesser-Known Native Grass of Puerto Rico If you’re passionate about native plants and happen to be gardening in Puerto Rico, you might be curious about some of the island’s more obscure native species. Enter Grisebach’s tribisee (Lasiacis grisebachii), a perennial grass that’s as intriguing as its name ...

Grisebach’s Tribisee: A Lesser-Known Native Grass of Puerto Rico

If you’re passionate about native plants and happen to be gardening in Puerto Rico, you might be curious about some of the island’s more obscure native species. Enter Grisebach’s tribisee (Lasiacis grisebachii), a perennial grass that’s as intriguing as its name suggests – though admittedly, information about this particular species is harder to find than a parking spot at the beach on a sunny weekend.

What Is Grisebach’s Tribisee?

Grisebach’s tribisee is a native perennial grass species that belongs to the graminoid family – that’s botanist-speak for grass or grass-like plants. This includes not just true grasses, but also sedges, rushes, and their cousins. You might also see this plant referenced by its synonym, Panicum grisebachii Nash, if you’re diving into older botanical literature.

As a perennial, this grass comes back year after year, which is always a win in the gardening world. There’s something deeply satisfying about planting something once and having it stick around, kind of like that one friend who never leaves your couch – except in this case, you actually want it there.

Where Does It Call Home?

This grass is a true Puerto Rican native, found exclusively on the island. It’s one of those special plants that makes Puerto Rico unique – a botanical treasure that exists nowhere else in the world. When you’re dealing with such a geographically limited species, you’re looking at something pretty special in the plant kingdom.

The Reality Check: What We Don’t Know

Here’s where things get interesting (and a bit frustrating for us plant nerds): Grisebach’s tribisee is one of those species that hasn’t received much attention in horticultural circles. We’re missing some key details that would make this blog post a lot more helpful, such as:

  • Specific growing conditions and care requirements
  • Mature size and growth rate
  • Aesthetic qualities and seasonal interest
  • Wildlife and pollinator benefits
  • Propagation methods
  • Availability in the nursery trade

Should You Grow It?

If you’re gardening in Puerto Rico and are committed to using native plants, Grisebach’s tribisee could be worth investigating – with some important caveats. The lack of readily available information suggests this isn’t a commonly cultivated species, which means you’ll need to do some detective work.

Native grasses can be fantastic additions to natural landscapes, providing habitat for wildlife, helping with erosion control, and requiring less maintenance once established. They’re also crucial for maintaining local ecosystems and supporting native wildlife that has evolved alongside these plants.

Your Next Steps

If you’re intrigued by this native grass, here’s what I’d recommend:

  • Contact local native plant societies or botanical institutions in Puerto Rico
  • Reach out to university extension services on the island
  • Connect with local ecologists or botanists who might have field experience with this species
  • Look for seed collection opportunities if you encounter the plant in its natural habitat (with proper permissions, of course)

The Bigger Picture

Plants like Grisebach’s tribisee remind us that there’s still so much we don’t know about our native flora. Every region has these lesser-known species that deserve more attention and study. While we can’t give you a complete growing guide today, highlighting these plants is important for conservation and for inspiring more research and cultivation efforts.

If you do manage to grow this grass successfully, consider yourself a pioneer in native plant gardening – and please share your experiences with fellow gardeners and researchers. Your observations could contribute valuable knowledge about this understudied species.

Sometimes the most rewarding gardening adventures involve the plants that don’t come with detailed care instructions. They challenge us to become better observers, more thoughtful gardeners, and active participants in plant conservation. And honestly, isn’t that what native gardening is really all about?

Grisebach’s Tribisee

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

Lasiacis (Griseb.) Hitchc. - smallcane

Species

Lasiacis grisebachii (Nash) Hitchc. - Grisebach's tribisee

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