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Carex hormathodes Fernald
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Pucciniaceae  Puccinia caricis @ BPI (1)

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Carex hormathodes Fernald
marsh straw sedge

Image of Carex hormathodes

General Information
Symbol: CAHO8
Group: Monocot
Family: Cyperaceae
Duration: Perennial
Growth Habit : Graminoid
Native Status : CAN   N
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   


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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: 384. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .



Symbol Scientific Name
CASTI4 Carex straminea Willd. ex Schkuhr var. invisa W. Boott


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 hormathodes Fernald – marsh straw sedge

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
New York marsh straw sedge Threatened

Wetland Status

Interpreting Wetland Status

North America
Atlantic and Gulf Coastal Plain OBL
Eastern Mountains and Piedmont OBL
Northcentral & Northeast OBL

Related Links

More Accounts and Images
Flora of North America (CAHO8)
Integrated Taxonomic Information System (CAHO8)
Integrated Taxonomic Information System (CASTI4)
Lady Bird Johnson Wildflower Center Native Plant Information Network (CAHO8)



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 335, 362, 364, 366 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

141. Carex hormathodes Fernald, Rhodora. 8: 165. 1906.

Carex moniliforme

Carex straminea Willdenow ex Schkuhr var. invisa W. Boott

Plants densely cespitose. Culms 20—80 cm. Leaves: sheaths adaxially conspicuously green-veined nearly to collar, narrow hyaline band or sharp Y-shaped region at collar; summits U-shaped; distal ligules 2—4 mm; blades 3—5 per fertile culm, 14—25 cm × 1—3 mm. Inflorescences usually nodding, ± open, yellow-brown or reddish brown, 2.5—6 cm × 5—16 mm; proximal internode (2—)5—16 mm; 2d internode 5—17 mm; proximal bracts bristlelike. Spikes 3—9, distant, distinct, ellipsoid, 6—15 × 4—8 mm, base acute, apex obtuse; lateral spikes with staminate portion 2 mm or less at base. Pistillate scales reddish brown, often with green or pale midstripe, lanceolate, 3.5—4.9 mm, shorter and much narrower than perigynia, margin reddish brown, apex firm, acuminate or awned. Perigynia spreading, reddish brown, conspicuously 5-veined or more on each face, lance-ovate to weakly obovate, flat except over achene, 3.8—5.6 × 1.9—2.8 mm, 0.4—0.5 mm thick, base rounded, margin flat, including wing 0.4—0.7 mm wide; beak ascending, reddish brown at tip, flat, 1/2 length of body, ciliate-serrulate, abaxial suture with brown or reddish brown-hyaline margin, distance from beak tip to achene 2—3 mm. Achenes elliptic, 1.5—1.8 × 0.9—1.1 mm, 0.3—0.4 mm thick. 2n = 74.

Fruiting mid summer. Maritime rock ledges, brackish or freshwater marshes, moist coastal sands; 0 m; St. Pierre and Miquelon; N.B., Nfld. and Labr. (Nfld.), N.S., P.E.I., Que.; Conn., Del., Maine, Md., Mass., N.H., N.J., N.Y., N.C., R.I., Va.

Some authors have treated Carex hormathodes as a variety of C. straminea. Characteristics of the perignyium beak and spike base, as well as the distinctive habitat and range clearly differentiate the taxa (P. E. Rothrock et al. 1997).

Updated: 2019-09-17 05:05:50 gmt
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