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Montana Field Guide

Montana Field Guides

Western Blue Iris - Iris missouriensis

Native Species

Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

External Links






 
General Description
Stems 10–50 cm. Leaves basal, 10–40 cm × 3–8 mm wide. Inflorescence of 1 to 3 flowers; spathes inflated, united at the base, sometimes membranous-margined, 4–8 cm long; pedicels 2–5 cm long. Flowers: sepals 4–6 cm long, whitish with a yellow midstripe and blue veins and margins; petals blue, 3–4 cm long; lobes of style branch white, 3–6 mm long. Capsule ellipsoid, 2–4 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC, AB south to CA, AZ, NM and NE (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 382

(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
Moist to wet meadows thickets, woodland margins; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Aradottir, A.L. 1984. Ammonia volatilization from native grasslands and forests of SW Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 48 p.
    • Grove, A.J. 1998. Effects of Douglas fir establishment in southwestern Montana mountain big sagebrush communities. M. Sc.Thesis. Bozeman, MT: Montana State University. 150 p.
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Matlock-Cooley, S.J. 1993. Interaction between Deermice, Antelope Bitterbrush, and cattle in southwest Montana. M.Sc. Thesis. Bozeman, MT: Montana State University 84 p.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
    • Rosgaard, A.I., Jr. 1981. Ecology of the mule deer associated with the Brackett Creek winter range in the Bridger Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 76 p.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
    • Stoecker, R.E. 1967. A population study of five species of small rodents in the Bridger Mountains of Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 32 p.
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Citation for data on this website:
Western Blue Iris — Iris missouriensis.  Montana Field Guide.  .  Retrieved on , from