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Montana Field Guide

Montana Field Guides

Larch-leaf Beardtongue - Penstemon laricifolius

Potential Species of Concern

Global Rank: G4
State Rank: S3S4
* (see State Rank Reason below)

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

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State Rank Reason (see State Rank above)
In Montana, Penstemon laricifolius is known from Carbon County where it is common on the south and west flanks of the Pryor Mountains.
 
General Description
Stems 5–20 cm. Herbage glabrous, often with puberulent stems. Basal leaf blades densely clustered, filiform, entire, 1–4 cm long. Stem leaves similar. Inflorescence an open, glabrous raceme or panicle. Flowers: calyx 3–6 mm long; sepals lanceolate, acuminate, basally scarious-margined; corolla rose to burgundy, 11–20 mm long, glabrous; anthers glabrous, opening across their full length. Capsule ca. 5 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Blooming in June.

Species Range
Present
 


Range Comments
Carbon and Big Horn counties, MT to CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 41

(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
Occurs in sandy, often limestone-derived, soils in juniper, Cercocarpus ledifolius and Artemisia arbuscula woodlands and shrublands typically between 4500 and 6000 ft (1370 to 1800 m).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Lesica, P. and P.L. Achuff. 1992. Distribution of vascular plant species of special concern and limited distribution in the Pryor Mountain desert, Carbon County, Montana. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, MT. 105 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:
Larch-leaf Beardtongue — Penstemon laricifolius.  Montana Field Guide.  .  Retrieved on , from