North America Native Plant

Hairy Beaksedge

Botanical name: Rhynchospora divaricata

USDA symbol: RHDI

Life cycle: perennial

Habit: grass

Native status: Probably native to Puerto Rico  

Synonyms: Rhynchospora hispidula (Vahl) Boeckeler, nom. illeg. (RHHI)   

Hairy Beaksedge: A Lesser-Known Puerto Rican Native Sedge If you’re passionate about native plants and have a particular interest in the unique flora of Puerto Rico, you might have stumbled across the intriguingly named hairy beaksedge (Rhynchospora divaricata). This perennial sedge represents one of the many specialized plants that call ...

Hairy Beaksedge: A Lesser-Known Puerto Rican Native Sedge

If you’re passionate about native plants and have a particular interest in the unique flora of Puerto Rico, you might have stumbled across the intriguingly named hairy beaksedge (Rhynchospora divaricata). This perennial sedge represents one of the many specialized plants that call the Caribbean home, though it’s certainly not your typical garden center find.

What Exactly Is Hairy Beaksedge?

Hairy beaksedge belongs to the sedge family (Cyperaceae), making it a grass-like plant that’s actually more closely related to rushes than true grasses. Like other members of its genus, this perennial sedge gets its beaksedge moniker from the distinctive beak-like appendages on its seeds. The hairy part of its common name likely refers to some fuzzy characteristics of the plant, though detailed descriptions of its appearance are surprisingly scarce in botanical literature.

You might occasionally see this plant referenced by its botanical synonym, Rhynchospora hispidula, though this name is considered illegitimate in current botanical nomenclature.

Where Does It Call Home?

This sedge is believed to be native to Puerto Rico, where it has likely evolved to thrive in the island’s unique tropical and subtropical conditions. Its distribution appears to be quite limited, restricted to this single Caribbean territory.

The Garden Reality Check

Here’s where things get a bit tricky for us mainland gardeners. Hairy beaksedge falls into that category of native plants that sound fascinating on paper but present real challenges in practice. The biggest hurdle? There’s remarkably little information available about its specific growing requirements, appearance, or how it behaves in cultivation.

This lack of cultivation information isn’t necessarily a bad thing – it often indicates that a plant has very specific habitat requirements that are difficult to replicate outside its native environment. For Puerto Rican gardeners interested in native landscaping, this sedge might be worth investigating, but you’d likely need to do some serious detective work to understand its needs.

What We Don’t Know (And Why That Matters)

The honest truth about hairy beaksedge is that many key details remain mysteries:

  • Its exact growing conditions and soil preferences
  • Whether it thrives in wet, dry, or variable moisture conditions
  • Its potential benefits to local wildlife and pollinators
  • Its overall size, appearance, and growth habits
  • How (or if) it can be successfully propagated

This information gap suggests that hairy beaksedge is either extremely rare, highly specialized to specific microhabitats, or simply hasn’t attracted much attention from botanists and horticulturists.

For the Adventurous Puerto Rican Gardener

If you’re gardening in Puerto Rico and are intrigued by this native sedge, your best bet would be to:

  • Connect with local native plant societies or botanical institutions
  • Look for it in its natural habitat to observe its preferred growing conditions
  • Consider it only if you can source it responsibly from established populations
  • Be prepared for some trial and error in cultivation attempts

The Bigger Picture

Hairy beaksedge serves as a perfect reminder that our planet is full of plant species that remain largely unstudied and uncultivated. While this can be frustrating for curious gardeners, it also highlights the importance of preserving natural habitats where these specialized species can continue to thrive in ways we don’t fully understand yet.

For most of us outside Puerto Rico, this sedge will remain more of a botanical curiosity than a garden possibility. But for those lucky enough to garden in its native range, it represents an opportunity to support truly local biodiversity – assuming you can figure out how to grow it!

Hairy Beaksedge

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

Cyperaceae Juss. - Sedge family

Genus

Rhynchospora Vahl - beaksedge

Species

Rhynchospora divaricata (Ham.) M.T. Strong - hairy beaksedge

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