North America Native Plant

Plukenet’s Flatsedge

Botanical name: Cyperus plukenetii

USDA symbol: CYPL3

Life cycle: perennial

Habit: grass

Native status: Native to the lower 48 states  

Plukenet’s Flatsedge: A Rare Native Sedge Worth Protecting Meet Plukenet’s flatsedge (Cyperus plukenetii), a humble yet important native sedge that’s quietly making its mark in wetland gardens across the eastern United States. While this grass-like perennial might not win any flashy flower contests, it plays a crucial role in our ...

Rare plant alert!

Region: New Jersey

Status: Endangered, Listed Pinelands, Highlands Listed, SH: New Jersey Highlands region ⚘ New Jersey Pinelands region ⚘ Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Plukenet’s Flatsedge: A Rare Native Sedge Worth Protecting

Meet Plukenet’s flatsedge (Cyperus plukenetii), a humble yet important native sedge that’s quietly making its mark in wetland gardens across the eastern United States. While this grass-like perennial might not win any flashy flower contests, it plays a crucial role in our native ecosystems and deserves a spot in the right garden setting.

What Makes This Plant Special

Plukenet’s flatsedge is a true American native, naturally occurring across 20 states from Florida up to New York and west to Texas and Missouri. This perennial sedge belongs to the Cyperaceae family, giving it that distinctive grass-like appearance that many gardeners love for its subtle, naturalistic charm.

However, here’s where things get serious: this plant is listed as endangered in New Jersey, with special protections in the Pinelands and Highlands regions. If you’re considering adding this species to your garden, it’s absolutely essential to source it responsibly from reputable native plant nurseries that propagate their own stock rather than wild-collecting.

Why Consider Growing Plukenet’s Flatsedge

While Plukenet’s flatsedge might not be the showiest plant in your garden, it offers several compelling reasons to include it in the right setting:

  • True native heritage supporting local ecosystems
  • Low-maintenance once established in appropriate conditions
  • Perfect for naturalized wetland areas and rain gardens
  • Helps with conservation efforts for a rare species
  • Provides structural habitat for small wildlife

Growing Conditions and Care

This sedge thrives in USDA hardiness zones 6-10, making it suitable for most of the eastern United States. Like many sedges, Plukenet’s flatsedge has specific growing requirements that you’ll need to meet for success:

  • Consistently moist to wet soil conditions
  • Full sun to partial shade
  • Tolerates periodic flooding
  • Prefers sandy or organic-rich soils

The key to growing this plant successfully is understanding that it’s not your typical garden perennial. This is a wetland species that needs consistent moisture, so don’t expect it to thrive in regular garden beds or drought-prone areas.

Perfect Garden Settings

Plukenet’s flatsedge shines in specialized garden environments:

  • Rain gardens and bioswales
  • Pond and stream margins
  • Bog gardens
  • Wetland restoration projects
  • Native plant preserves

A Word of Caution and Conservation

Given its endangered status in New Jersey and its specialized habitat requirements, this isn’t a plant for casual gardeners or those looking for easy ground cover. However, if you have the right conditions and a commitment to conservation, growing Plukenet’s flatsedge can be incredibly rewarding.

Always purchase from nurseries that clearly state their plants are nursery-propagated, not wild-collected. Better yet, contact local native plant societies or conservation organizations to learn about seed collection and propagation workshops – you might be able to contribute to conservation efforts while adding this rare beauty to your garden.

Remember, by choosing to grow rare native plants like Plukenet’s flatsedge, you’re not just creating a garden – you’re participating in the important work of preserving our natural heritage for future generations.

Plukenet’s Flatsedge

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

Cyperus L. - flatsedge

Species

Cyperus plukenetii Fernald - Plukenet's flatsedge

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