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Carex tonsa (Fernald) E. P. Bicknell
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Carex tonsa (Fernald) E.P. Bicknell
shaved sedge

Image of Carex tonsa

General Information
Symbol: CATO10
Group: Monocot
Family: Cyperaceae
Duration: Perennial
Growth Habit : Graminoid
Native Status : CAN   N
L48   N
Data Source and Documentation
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Plants-NRCS Logos
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

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 1: 394. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . 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 tonsa (Fernald) E.P. Bicknell – shaved sedge

Subordinate Taxa

The Plants Database includes the following 2 subspecies of Carex tonsa . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Carex tonsa</i>
(Fernald) E.P. Bicknell var. <i>
(Mack.) Crins
Carex tonsa var. rugosperma
parachute sedge Distribution of <i>
Carex tonsa</i>
(Fernald) E.P. Bicknell var. <i>
tonsa </i>
Carex tonsa var. tonsa
shaved sedge

Legal Status

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
Flora of North America (CATO10)
Integrated Taxonomic Information System (CATO10)
Lady Bird Johnson Wildflower Center Native Plant Information Network (CATO10)
University of Wisconsin - Stevens Point Freckmann Herbarium (CATO10)



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 538 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

430. Carex tonsa (Fernald) E. P. Bicknell, Bull. Torrey Bot. Club. 35: 492. 1908.

Carex umbellata Schkuhr ex Willdenow var. tonsa Fernald, Proc. Amer. Acad. Arts 37: 507. 1902; C. rugosperma Mackenzie var. tonsa (Fernald) E. G. Voss

Plants densely to loosely cespitose; rhizomes ascending to erect, brown to reddish brown, 0—10 mm, stout. Culms 4—16 cm, scabrous distally; bases (remnants of old leaves) fibrous. Leaf blades pale to bright green, equaling or exceeding stems, 0.5—4.3 mm wide, herbaceous or coriaceous, glabrous abaxially, strongly scabrous to papillose adaxially. Inflorescences with both staminate and pistillate scales; peduncles of basal pistillate spikes erect, short to elongate, stout to slender; peduncles of staminate spikes 0.8—15 mm; proximal nonbasal bracts scalelike, shorter than inflorescences. Spikes: proximal pistillate spikes 2—3 (basal spikes 1—2); cauline spikes usually overlapping with staminate spikes, with 3—10(—15) perigynia; staminate spikes 4.5—11.3 × 1.1—3 mm. Scales: pistillate scales pale brown to reddish brown, with narrow white margins, ovate, 2.9—4.1 × 1.5—1.9 mm, equaling or exceeding perigynia, apex acute to long-acuminate; staminate scales ovate, 4.2—5.4 × 1.2—2.1 mm, apex obtuse or acute to acuminate. Anthers 1.6—2.9 mm. Perigynia green to pale brown, veinless, ellipsoid, obtusely trigonous in cross section, 3.1—4.7 × 1.1—1.6 mm; beak straight, pale green, occasionally with reddish brown tinge near apex, strongly 2-edged, 0.9—2 mm, smooth or ciliate-serrulate, apical teeth 0.2—0.5 mm. Stigmas 3. Achenes brown, ellipsoid to obovoid, obtusely trigonous in cross section, 1.6—2 × 1.2—1.6 mm.

Varieties 2 (2 in the flora): North America.

Updated: 2019-02-16 01:07:01 gmt
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