Carex intumescens Rudge

vernacular greater bladder sedge — species · Cyperaceae

USDA: CAIN12
GBIF: 2727755
Rank: species

greater bladder sedge (Carex intumescens) — Platephotograph · Jeff SkrentnyCC BY-NC source · iNaturalist ↗

§2Habit & range

Growth habit: Graminoid
Duration: Perennial
Group: Monocot
Family: Cyperaceae Juss.
Genus: Carex

§2a

Native status, by region

CAN Canada Native
L48 Lower 48 States Native
SPM St. Pierre & Miquelon Native

§2b

County-level range

· 4 counties across 1 state

Legend Native · 4 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: None
Shade: Low
Moisture use: High
Fire: High
Salinity: None
Anaerobic: High
CaCO₃: Low
Hedging: None

§3b

Climate & soil

Cold tolerance: -33 °F minimum
Frost-free days: 85 min.
Precipitation: 36–55 in/yr
pH range: 4.8–6.9
Root depth: 8 in min.
Fertility need: High
Soil texture: medium, fine

§3c

Form & growth

Growth form: Bunch
Growth rate: Moderate
Lifespan: Moderate
Mature height: 3 ft
Foliage texture: Medium
Foliage colour: Dark Green
Porosity (summer): Moderate
Porosity (winter): Porous
Flower colour: Green
Fruit colour: Brown
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Bloom period: Late Spring
Seed abundance: Low
Seed begins: Summer
Seed ends: Fall
Spread rate: Slow
Stratify: No
Propagation: seed, bare root, sprigs

§3e

Use & availability

Commercial availability: Routinely Available
Nursery stock: No
Browse palatability: Low
Graze palatability: Low
Palatable, human: No
Protein potential: Low
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 4 counties across 1 state.

Rhode Island view state ↗ 4 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/CAIN12 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/2727755 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-25

fetched 2026-05-25T18:27:19Z