Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Water Bulrush - Schoenoplectus subterminalis
Other Names:  Scirpus subterminalis

Species of Concern

Global Rank: G5
State Rank: S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS: SENSITIVE
BLM:
MNPS Threat Rank: 2
C-value: 9

External Links






State Rank Reason (see State Rank above)
Over a dozen known occurrences in western Montana, most of which are moderate to large-sized populations primarily on National Forest lands. Populations are potentially vulnerable to changes in water levels or increases in nutrient and sediment loads associated with development, agriculture or adjacent timber harvesting.
 
General Description
Aquatic. Stems terete, 20–80 cm, submergent or floating, not emergent. Leaf blades folded, 1 mm or less wide. Inflorescence a solitary spikelet. Spikelet 7–12 mm long. Scales 4–6 mm long, glabrous, membranous, light brown; the tip not notched or awned. Flowers: bristles 6, ca. as long as achene; stigmas 3. Achene brown, 3-sided, 2–4 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Flowering in late June-July, fruiting in August.

Diagnostic Characteristics
The flaccid stems and aquatic habit distinguish this species from all members of Schoenoplectus and Scirpus in our area.

Species Range
Present
 


Range Comments
AK to NL south to OR, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 29

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

Recency

 

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



Habitat
Open water and boggy margins of ponds, lakes, and sloughs at 0.1-3 m depth in the valley, foothill, and montane zones.

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Bursik, R. J., and R. K. Moseley. 1992. Forty-year changes in Hager Lake Fen, Bonner County, Idaho. Cooperative Challenge Cost-share Project, Idaho Panhandle National Forests and Idaho Conservation Data Center, Idaho Department of Fish and Game, Boise. 31 pp.
    • Bursik, R. J., and R. K. Moseley. 1992. Vegetation and water chemistry monitoring and twenty-year floristic changes at Huff Lake Fen, Kaniksu National Forest. Cooperative Challenge Cost-share Project, Idaho Panhandle National Forests and Idaho Conservation Data Center, Idaho Department of Fish and Game. 27 pp.
    • Hoitsma, T. 1992. Sensitive Plant Survey, Fortine Ranger District, Kootenai National Forest. [Unpublished Report] 65 pp. plus appendices.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Maguire, B. 1939. Distrubution notes concerning plants of Glacier National Park, Montana-II. Rhodora 41:504-508.
    • Moseley, R. K., R. J. Bursik, and M. Manusco. 1991. Floristic inventory of wetlands in Fremont and Teton counties, Idaho. Unpublished report on file IDCDC Department of Fish & Game, Boise, ID. 60 pp.
    • Rumely, J. H. 1956. Plant ecology of a bog in northern Idaho. Unpublished dissertation, Washington State University, Pullman. 85 pp.
    • Schuyler, A. E. 1983. Distributional Notes....
  • Web Search Engines for Articles on "Water Bulrush"
  • Additional Sources of Information Related to "Monocots"
Login Logout
Citation for data on this website:
Water Bulrush — Schoenoplectus subterminalis.  Montana Field Guide.  .  Retrieved on , from