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Carex arapahoensis Clokey
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https://plants.usda.gov/java/profile?symbol=CAAR13 ---> http://plants.usda.gov/core/profile?symbol=CAAR13
http://plants.usda.gov/core/profile?symbol=CAAR13 ---> https://plants.usda.gov/core/profile?symbol=CAAR13
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Carex arapahoensis Clokey
Arapaho sedge

Image of Carex arapahoensis

General Information
Symbol: CAAR13
Group: Monocot
Family: Cyperaceae
Duration: Perennial
Growth Habit : Graminoid
Native Status : L48   N
Data Source and Documentation
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green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Carex thumbnails at the Plants Gallery

Hurd, E.G., N.L. Shaw, J. Mastrogiuseppe, L.C. Smithman, and S. Goodrich. 1998. Field guide to Intermountain sedges . General Technical Report RMS-GTR-10. USDA Forest Service, RMRS, Ogden. Provided by USDA Forest Service RMRS Boise Aquatic Sciences Lab . Usage Requirements .

Hurd, E.G., N.L. Shaw, J. Mastrogiuseppe, L.C. Smithman, and S. Goodrich. 1998. Field guide to Intermountain sedges . General Technical Report RMS-GTR-10. USDA Forest Service, RMRS, Ogden. Provided by USDA Forest Service RMRS Boise Aquatic Sciences Lab . Usage Requirements .




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Commelinidae
Order Cyperales
Family Cyperaceae – Sedge family
Genus Carex L. – sedge
Species Carex arapahoensis Clokey – Arapaho sedge

Subordinate Taxa

This plant has no children

Legal Status

Wetland Status

Interpreting Wetland Status

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Flora of North America (CAAR13)
Integrated Taxonomic Information System (CAAR13)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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Link to Flora of North America home
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FNA Vol. 23 Page 342, 352, 354, 356 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

121. Carex arapahoensis Clokey, Rhodora. 21: 83. 1919.

Plants densely cespitose. Culms 20—30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules 1—2(—2.5) mm; blades 3(—5) per fertile culm, 10—40 cm × 2.2—3.2 mm. Inflorescences dense or sometimes open proximally, brown or purplish, 1.2—2(—2.5) cm × (8—)12—18 mm; proximal internode 1.5—3.5 mm; 2d internode 0.5—2.5 mm; proximal bracts bristlelike, shorter than inflorescences. Spikes 4—5, densely aggregated, usually at least proximal 1 distinct, obovoid, 9—12 × (5.5—)7—9 mm, base rounded or attenuate, apex rounded or acute. Pistillate scales red- or purple-brown to dark brown, sometimes gold above the middle, sometimes with paler midstripe, ovate to broadly ovate, 4.3—5.6 mm, shorter than or equaling perigynium beaks, equaling or narrower than perigynia, margin white-hyaline, green, or gold 0.15—0.3 mm wide, apex usually acute. Anthers long-persistent. Perigynia appressed to ascending, usually dark brown, often green or gold distally and at margins, veinless or conspicuously 3—6-veined abaxially, inconspicuously veined adaxially, broadly obovate to broadly ovate, flat except over achene, 4—5.5 × 2—2.7 mm, 0.25—0.4(—0.5) mm thick, margin flat, including wing 0.4—0.6 mm wide, ciliate-serrulate at least on distal body; beak purplish or brown to red-brown, white-hyaline at tip, cylindric, unwinged, entire for 0.5—1.3 mm from tip, abaxial suture with conspicuous white margin, distance from beak tip to achene (1.9—)2.2—2.9 mm. Achenes obovate or ovate, 1.6—2.1 × 1—1.4 mm, 0.3—0.5 mm thick.

Fruiting late summer. Dry mountainsides, high meadows; of conservation concern; 3400—4000 m; Colo., Utah, Wyo.

Updated: 2019-02-22 23:19:32 gmt
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