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Montana Field Guide

Montana Field Guides

Mt. Shasta Sedge - Carex straminiformis

Status Under Review
Undetermined Origin

Global Rank: G5
State Rank: SU
(see State Rank Reason below)

Agency Status


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State Rank Reason (see State Rank above)
Reported for Montana (Dorn 1984, Hermann, Hitchcock & Cronquist 1973 and FNA vol 23). More information is needed to determine the status of the species in the state.
General Description
Densely caespitose, to 45 cm tall, rhizomes if present then short. Blades 1-3 mm wide, basal and on lower culm. Lowest bract lacking or shorter to slightly longer than the inflorescence. Inflorescence 1.5-2.5 cm long, 1-2 cm wide, headlike, usually much overtopping the leaves. Spikes 3-9, gynaecandrous, 7-15 mm long, 5-7 mmwide, ovate to nearly globose, sessile, each with up to 30 perigynia. Pistillate scales shorter than or subequal to teh perigynia and a little narrower, brownish with a green midstripe and hyaline margines, acute. Perigynia 4-5.6 mm long, 1.6-2.5 mm wide, ovate-elliptic, greenish or light brown, finely serrulate in the distal half and sometimes below, gradually or rather abruptly tapered to a bi-dentate, more or less flattened beak. Stigmas 2; achenes lenticular (adapted from: Welsh et al., 1993, A Utah Flora, 2nd ed.).

Range Comments
WA east to MT, south to CA (where it is most common) to NV and UT (Kartesz in prep. 2012).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Sagebrush, meadows, and spruce communities (Welsh et al., 1993, A Utah Flora, 2nd ed.).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • U.S. Department of Agriculture, Forest Service. Idaho and Wyoming endangered and sensitive plant field guide. [n.d.]. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Region. 192 p.
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Citation for data on this website:
Mt. Shasta Sedge — Carex straminiformis.  Montana Field Guide.  .  Retrieved on , from