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Montana Field Guide

Montana Field Guides

Alberta Beardtongue - Penstemon albertinus
Other Names:  Penstemon caelestinus


Global Rank: G4G5
State Rank: S4S5
* (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)
Very numerous collections from 15 counties.
 
General Description
Stems ascending to erect, 10–40 cm. Herbage glabrous. Basal leaf blades lanceolate to narrowly ovate, entire to weakly serrate, 1–4 cm long. Stem leaves narrowly lanceolate to oblanceolate, entire to weakly serrate, 15–45 mm long. Inflorescence with 3 to 8 open verticillasters, glabrous to weakly glandular. Flowers: calyx 3–5 mm long; sepals ovate, acute to acuminate, barely scarious-margined; corolla blue, 12–18 mm long, glabrous to glandular; anthers glabrous, opening across their full length. Capsule 3–6 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Similar to Penstemon wilcoxii, but with the leaves are less prominently toothed, more mat-forming and with a narrower inflorescence. Numerous populations intergrade between these two species.

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 145

(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
Grasslands, rock outcrops, dry, open forest; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Alberta Beardtongue — Penstemon albertinus.  Montana Field Guide.  .  Retrieved on , from