North America Native Plant

Burr Sedge

Botanical name: Lagenocarpus guianensis

USDA symbol: LAGU

Life cycle: perennial

Habit: grass

Native status: Native to Puerto Rico  

Synonyms: Lagenocarpus portoricensis Britton (LAPO5)   

Burr Sedge: A Native Wetland Wonder for Caribbean Gardens If you’re looking to create a thriving wetland garden or restore a soggy corner of your Puerto Rican landscape, meet your new best friend: burr sedge (Lagenocarpus guianensis). This unassuming native sedge might not win any beauty contests, but it’s absolutely ...

Burr Sedge: A Native Wetland Wonder for Caribbean Gardens

If you’re looking to create a thriving wetland garden or restore a soggy corner of your Puerto Rican landscape, meet your new best friend: burr sedge (Lagenocarpus guianensis). This unassuming native sedge might not win any beauty contests, but it’s absolutely essential for anyone serious about authentic Caribbean wetland gardening.

What Exactly Is Burr Sedge?

Burr sedge is a perennial, grass-like plant that belongs to the sedge family (Cyperaceae). Don’t let its humble appearance fool you—this little powerhouse is perfectly adapted to life in Puerto Rico’s wetlands. You might also encounter it listed under its scientific synonym, Lagenocarpus portoricensis, but it’s the same reliable plant either way.

As an obligate wetland species, burr sedge almost always occurs in wetlands throughout the Caribbean region. Think of it as nature’s way of saying this spot needs to stay wet!

Where Does Burr Sedge Call Home?

This sedge is a true Caribbean native, with Puerto Rico serving as its primary home base. If you’re gardening in Puerto Rico, you’re working with a plant that has been thriving in your local ecosystem for countless generations.

Why Consider Burr Sedge for Your Garden?

Here’s the thing about burr sedge—it’s not going to wow you with showy flowers or dramatic foliage. Instead, it offers something more valuable: authentic ecological function. Here’s what makes it special:

  • True native credentials: Supporting local ecosystems has never been easier
  • Wetland expertise: Perfect for rain gardens, bog areas, and restoration projects
  • Low maintenance: Once established in the right conditions, it practically takes care of itself
  • Perennial reliability: Returns year after year without replanting

The Perfect Spot for Burr Sedge

This isn’t a plant for your typical flower border. Burr sedge thrives in consistently moist to wet soils and can handle everything from full sun to partial shade. It’s ideal for:

  • Wetland restoration projects
  • Rain gardens and bioswales
  • Pond margins and stream banks
  • Native plant gardens with adequate moisture
  • Areas that flood seasonally

In USDA hardiness zones 10-12, burr sedge will be right at home, making it perfect for tropical and subtropical Caribbean gardens.

Growing Burr Sedge Successfully

The secret to happy burr sedge? Keep it wet! Here are the key growing tips:

  • Moisture is everything: This plant needs consistently moist to wet soil conditions
  • Sun flexibility: Grows well in full sun to partial shade
  • Soil preferences: Thrives in wetland soils but adapts to various wet soil types
  • Planting: Spring planting works best when natural moisture levels are high
  • Maintenance: Minimal care needed once established in appropriate conditions

What About Wildlife and Pollinators?

Like many sedges, burr sedge is wind-pollinated rather than insect-pollinated, so it won’t be buzzing with bees. However, as a native wetland plant, it likely provides habitat and food sources for various wetland wildlife, though specific benefits aren’t well-documented.

The Bottom Line on Burr Sedge

Burr sedge isn’t flashy, but it’s exactly what your wetland garden needs. If you have a wet area that you want to plant with appropriate natives, or if you’re tackling a wetland restoration project, this sedge deserves serious consideration. Just remember—this is a plant that demands wet feet, so don’t expect it to thrive in regular garden beds.

For Puerto Rican gardeners committed to native plant gardening and wetland restoration, burr sedge represents an authentic piece of your local ecosystem. Sometimes the most valuable plants are the ones that do their job quietly and efficiently, year after year.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Caribbean

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Burr Sedge

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

Lagenocarpus Nees - lagenocarpus

Species

Lagenocarpus guianensis Lindl. & Nees - burr sedge

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