Carex subspathacea Wormsk. ex Hornem.

vernacular Hoppner's sedge — species · Cyperaceae

USDA: CASU8
GBIF: 2726445
Rank: species

Hoppner's sedge (Carex subspathacea) — Platephotograph · Samuel Brinker source · iNaturalist ↗

§2Habit & range

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

§2a

Native status, by region

AK Alaska Native
CAN Canada Native
GL Greenland Native

§2b

County-level range

· 5 counties across 1 state

Legend Native · 5 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: None
Shade: High
Salinity: High
Anaerobic: Medium
Hedging: None

§3b

Climate & soil

Cold tolerance: -52 °F minimum
Frost-free days: 120 min.
Precipitation: 7–20 in/yr
pH range: 4.5–8.5
Root depth: 12 in min.
Fertility need: High

§3c

Form & growth

Growth form: Rhizomatous
Growth rate: Moderate
Lifespan: Short
Mature height: 1 ft
Foliage texture: Fine
Foliage colour: Yellow-Green
Flower colour: Yellow
Fruit colour: Brown
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Stratify: No
Seeds / lb: 823,186
Propagation: seed, sod

§3e

Use & availability

Nursery stock: No
Browse palatability: Medium
Graze palatability: Medium
Palatable, human: No
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 5 counties across 1 state.

Alaska view state ↗ 5 N ▾

§5Sources & provenance

USDA PLANTS

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

plants.usda.gov/CASU8 ↗

GBIF Backbone

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

gbif.org/species/2726445 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T05:06:36Z