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Montana Field Guides

Beargrass - Xerophyllum tenax

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Native Species

Global Rank: G5
State Rank: S5
C-value: 5


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Glabrate, rhizomatous perennial. Stems leafy, erect, 50–120 cm. Leaves: basal, linear, wiry, scabrous on the margins, 15–60 cm × 2–4 mm, forming large tussocks; cauline leaves alternate, similar. Inflorescence a terminal raceme, expanding from hemispheric to linear-oblong and up to 40 cm long; pedicels ascending, 2–4 cm long. Flowers regular, star-shaped; tepals white, separate, narrowly oblong, 5–10 mm, spreading; stamens longer than tepals; styles 3. Fruit a globose, 3-lobed, several-seeded capsule, 5–8 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
BC, AB south to CA, ID and MT (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5726

(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
Coniferous forest, often where fire has reduced tree cover, avalanche slopes, meadows; montane, subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Hitchcock, C. L., A. Cronquist, M. Ownbey, and J. W. Thompson. 1969. Vascular Plants of the Pacific Northwest. Part I: Vascular Cryptogams, Gymnosperms and Monocotyledons. Seattle, WA: University of Washington Press. 914 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Conway, T.M. 1982. Response of understory vegetation to varied lodgepole pine (Pinus contorta) spacing intervals in Western Montana. M.Sc. Thesis. Bpzeman, MT: Montana State University. 76 p.
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • Forcella, F. 1977. Flora, chorology, biomass and productivity of the Pinus albicaulis-Vaccinium scoparium association. M.S. Thesis. Bozeman, MT: Montana State University. 99 pp.
    • Fultz, J.E. 2005. Effects of shelterwood management on flower-visiting insects and their floral resources. M.Sc. Thesis. Bozeman, MT: Montana State University. 163 p.
    • Gaffney, W.S. 1941. The effects of winter elk browsing, South Fork of the Flathead River, Montana. Journal of Wildlife Management 5(4):427-453.
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 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. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • Morgan, J.T. 1993. Summer habitat use of white-tailed deer on the Tally Lake ranger district, Flathead National Forest. Ph.D. Dissertation. Montana State University, Bozeman. pp. 103.
    • Picton, H.D. 1959. Use of vegetative types, migration, and hunter harvest of the Sun River elk herd, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 39 p.
    • Plaggemeyer, J.B. 1995. Effects of overstory thinning on lodgepole pine understories. M.Sc. Thesis. Bozeman, MT: Montana State University. 55 p.
    • Reichel, J.D., D.L. Genter and E. Atkinson. 1992. Sensitive animal species in the Elkhorn and Big Belt Mountains of the Helena National Forest. Unpublished report to the Helena National Forest. Montana Natural Heritage Program, Helena. 158 p.
    • Schubloom, L.A. 1995. Lichens as air quality indicators in three areas of southwestern Montana: lichen floristics and elemental analysis. M.Sc. Thesis. Bozeman, MT: Montana State University. 130 p.
    • Stansberry, B.J. 1991. Distribution, movements, and habitat use during spring, summer, and fall by mule deer in the North Salish Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 64 p.
    • White, K.L. 1960. Differential range use by mule deer in the spruce-fir zone. Northwest Science 34(4):118-126.
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Citation for data on this website:
Beargrass — Xerophyllum tenax.  Montana Field Guide.  .  Retrieved on , from