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Montana Field Guide

Montana Field Guides

Stiff-leaf Beardtongue - Penstemon aridus

Native Species

Global Rank: G5?
State Rank: S4S5

Agency Status
MNPS Threat Rank:

External Links

General Description
Stems 5–25 cm. Herbage glabrous to puberulent on the stems. Basal leaf blades densely clustered, linear or linear-oblanceolate, entire, 1–5 cm long. Stem leaves linear, entire, 1–5 cm long. Inflorescence of 1 to 5, open, few-flowered, sparsely glandular verticillasters. Flowers: calyx often bluish, 3–6 mm long; sepals lanceolate to ovate, sometimes erose- and scarious-margined; corolla blue, 10–18 mm long, glandular; anthers glabrous, opening across their full length. Capsule 4–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Endemic to southwest MT, adjacent ID and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 212

(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)

Rocky soil of grasslands, sagebrush steppe, woodlands, exposed ridges, slopes; montane, subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
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    • 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.
    • 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.
    • Strickler, D. 1997. Northwest penstemons. Flower Press, Columbia Falls, Montana. 191 pages.
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Citation for data on this website:
Stiff-leaf Beardtongue — Penstemon aridus.  Montana Field Guide.  .  Retrieved on , from