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Montana Field Guide

Montana Field Guides

Taper-leaf Beardtongue - Penstemon attenuatus

Native Species

Global Rank: G4
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 5

External Links

General Description
Stems ascending to erect, 5–70 cm. Herbage glabrous to puberulent on the stems. Basal leaf blades oblanceolate to elliptic, entire, 2–10 cm long. Stem leaves narrowly lanceolate to oblanceolate, entire to rarely denticulate, 2–10 cm long. Inflorescence with 2 to 4 verticillasters, glandular. Flowers: calyx 3–6 mm long; sepals lanceolate to narrowly ovate, acuminate, scarious-margined; corolla blue, 1–2 cm long, glandular; anthers glabrous. Capsule 3–6 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are varieties attenuatus and pseudoprocerus (Rydb.) Cronquist.

Species Range

Range Comments
WA to MT south to OR, 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: 63

(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)


  • Additional ReferencesLegend:   View Online Publication
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    • Clark, D.V. 1971. Speciation in Penstemon (Scrophulariaceae). Ph.D dissertation. University of Montana, Missoula. 169 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Strickler, D. 1997. Northwest penstemons. Flower Press, Columbia Falls, Montana. 191 pages.
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Citation for data on this website:
Taper-leaf Beardtongue — Penstemon attenuatus.  Montana Field Guide.  .  Retrieved on , from