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Montana Field Guide

Montana Field Guides

Wilcox's Beardtongue - Penstemon wilcoxii

Native Species

Global Rank: G4
State Rank: S4
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Numerous collections at MONTU from Sanders, Lake, Powell, Ravalli, Mineral, Missoula, Beaverhead counties. Grades into P. albertinus.
General Description
Stems ascending to erect, 30–80 cm. Herbage glabrous to sparsely puberulent. Basal leaf blades lanceolate to oblanceolate, serrate, 3–9 cm long. Stem leaves lanceolate to ovate, serrate to denticulate, 3–7 cm long, often clasping the stem, larger than the basal blades. Inflorescence with 3 to 8, open verticillasters, glabrous to sparsely glandular. Flowers: calyx 2–5 mm long; sepals lanceolate to ovate, acute, scarious-margined; corolla blue, 12–21 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 eastern OR, WA to northwest MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 24

(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 woodlands, open forest, shrub fields; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Martinka, R.R. 1970. Structural characteristics and ecological relationships of male blue grouse (Dendragapus obscurus (Say)) territories in southwestern Montana. Ph.D Dissertation. Bozeman, MT: Montana State University. 73 p.
    • Strickler, D. 1997. Northwest penstemons. Flower Press, Columbia Falls, Montana. 191 pages.
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Citation for data on this website:
Wilcox's Beardtongue — Penstemon wilcoxii.  Montana Field Guide.  .  Retrieved on , from