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Montana Field Guide

Montana Field Guides

Sprangletop - Scolochloa festucacea

Species of Concern
Native Species

Global Rank: G5
State Rank: S1
(see State Rank Reason below)
State Threat Score: No Known Threats
C-value: 7

Agency Status


External Links

State Rank Reason (see State Rank above)
Scolochloa festucacea occurs through most of Canada and in portions of mid-western and western States. In Montana it is known from 3 locations collected from 1949 to 1999 in Flathead County. A fourth location from a specimen with a poorly defined location in Carbon county needs to be verified. Surveys to find this species have been unsuccessful.
  • Details on Status Ranking and Review
    Sprangletop (Scolochloa festucacea) Conservation Status Review
    Review Date = 09/20/2017
    View State Conservation Rank Criteria
    Range Extent

    ScoreB - 100-250 sq km (~40-100 sq mi)

    Area of Occupancy

    ScoreC - 3-5 4-km2 grid cells

    Number of Populations

    ScoreB - 6 - 20

    Number of Occurrences or Percent Area with Good Viability / Ecological Integrity

    ScoreA - No occurrences with excellent or good (A or B) viability or ecological integrity

    Environmental Specificity

    ScoreB - Narrow. Specialist or community with key requirements common

General Description
Cool season, perennial, rhizomatous, aquatic. Stems 1–2 m. Leaves: blades 5–11 mm wide, flat and ascending; ligule membranous, 4–8 mm long; sheaths with overlapping margins. Inflorescence an open panicle 15–26 cm long. Spikelets 7–11 mm long, with 5 to 9 florets; glumes similar to lemmas. Lemmas 4–9 mm long, each with a distinctly hairy callus, usually keeled and distinctly parallel veined, unawned but with an acute tip; palea enclosed in floret. Disarticulation above glumes; unit of dispersal is the floret (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions


Range Comments
Collected in Flathead County; throughout the northwest region of North America (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 3

(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)

Predicted Suitable Habitat Model

This species has a Predicted Suitable Habitat Model available.

To learn how these Models were created see

Threats or Limiting Factors
Threat impact not assigned because threats are not known (MTNHP Threat Assessment 2021).

  • Literature Cited AboveLegend:   View Online Publication
    • Flora of North America Editorial Committee, eds. 2007. Flora of North America North of Mexico. Volume 24. Magnoliophyta: Commelinidae, Part 1. Oxford University Press, Inc., NY. xxxiii + 911 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Sturm, J. and J.G. Sturm. 1796. Deutschlands Flora in Abbildungen (nur Tafeln). Stuttgart, Germany. 882 pp.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Britton, N. L. and A. B. Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. 2nd Edition in 3 Volumes. New York, NY: Charles Scribner's Sons. B13BRI01PAUS.
    • 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.
    • Smith, A. L. 1973. Life cycle of the marsh grass Scolochloa festucacea. Canadian Journal of Botany 51:1661-1668.
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Citation for data on this website:
Sprangletop — Scolochloa festucacea.  Montana Field Guide.  .  Retrieved on , from