Species Identification

Interested in the identification of penstemons? Please select a species then click on submit:

AttributeThe current selection is Penstemon_albertinus
ClassificationPenstemon Penstemon Penstemon Humiles
GeneralAlberta Penstemon This species freely hybridizes with P. wilcoxii and P. attenuatus where their ranges overlap. They differ in leaf shape, size of plants and flowers and spread of inflorescence. Blooms: Late Spring to Mid-Summer
AntherGlabrous, the sacs opening completely, spreading nearly opposite and explanate (opened flat), 0.6-0.9 mm long.
StaminodeLightly golden bearded, recurved and just about reaching the orifice.
LeavesBasal ones 10 cm (to 4) long, including petiole (stem), sharply toothed to nearly entire, bright green and glabrous (smooth; stem leaves reduced and stemless, finely serrate.
Stems1.5-3dm (6-12) tall, from a basal rosette. Where stems much exceed 3 dm, it is likely a hybrid of P. wilcoxii.
InflorescenseNarrow to very moderate spreading, glandular hairy and composed of 4 to 8 few-flowered, loose verticillasters.
Corolla13-20 mm (1/2-3/4) long, bright blue to pinkish with darker guidelines in pale throat, palate lightly bearded, tube moderately expanded in the throat.
Flower Color
Calyx3-5 mm (to 3/16) long, sepals acute or acuminate, edges narrowly thin and mostly entire.
HabitatOpen, rocky or gravelly sites from valleys to into the mountains.
RangeSoutheastern British Columbia and sw Alberta to s ID.