Cyperaceae

Thinleaf cottonsedge

Eriophorum viridicarinatum (Engelm.) Fernald

Family: Cyperaceae
Genus: Eriophorum

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Thinleaf cottonsedge (Eriophorum viridicarinatum) — FlowerPhoto: Jason K., CC BY 4.0, from iNaturalist

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Common names

By language (2)

English: Thinleaf cottonsedge, Green-keeled cottongrass, Tassel cottongrass, Thinleaf cottongrass
French: Linaigrette verte

Synonyms

Eriophorum latifolium var. viridicarinatum Engelm.
Eriophorum viridicarinatum f. viridicarinatum

Flowers

In flower: May to June (from 78 flowering iNaturalist observations worldwide)

Characteristics

Growth habit: Graminoid
Lifespan: Perennial
In the US and Canada: Alaska: native, Canada: native, Lower 48 states: native, St. Pierre and Miquelon: native

Photos

FlowerPhoto: Jason K., CC BY 4.0, from iNaturalist
FlowerPhoto: Tom Scavo, CC BY 4.0, from iNaturalist
FlowerPhoto: Tom Scavo, CC BY 4.0, from iNaturalist
FlowerPhoto: Derek, CC BY 4.0, from iNaturalist
FruitPhoto: Tom Scavo, CC BY 4.0, from iNaturalist
FruitPhoto: Alexandria Szakacs, CC BY 4.0, from iNaturalist
FruitPhoto: Micki Colbeck, CC BY 4.0, from iNaturalist
Photo: Owen Strickland, CC BY 4.0, from iNaturalist
Photo: Matt Berger, CC BY 4.0, from iNaturalist
Photo: Patrice Dupont, CC BY 4.0, from iNaturalist
Photo: lallen, CC0, from iNaturalist
Photo: Justin Donahue, CC BY 4.0, from iNaturalist

More in Eriophorum

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.