UW Burke Herbarium species comparison

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Penstemon rattanii

Penstemon euglaucus
Penstemon rattanii

glaucous beardtongue
Habit Tufted perennial from a woody rhizome, the slender stems 2-7 dm. tall, glabrous and glaucous throughout.
Leaves

Leaves opposite, entire, the basal ones petiolate, oblanceolate, forming well-developed rosettes, up to 15 cm. long and 2 cm. wide;

cauline leaves few, well-developed, sessile, not over 10 cm. long and 2 cm. wide.
Flowers

Inflorescence of 1-several dense verticillasters, the flowers spreading at right angles to the stem;

calyx 3.5-5 mm. long, the 5 segments broadly scarious-margined, abruptly contracted to a narrow, pointed tip;

corolla blue-purple, 11-15 mm. long, bilabiate, the tube expanded, 3-5 mm. wide at the mouth; raised portion of the lower petal bearded;

staminode usually bearded at the expanded tip;

pollen sacs glabrous, ovate, 0.6-1.0 mm. long, not quite opening to the tip.
Fruits

Capsule 5-6 mm. long

Penstemon rattanii

Penstemon euglaucus
Flowering time June-September
Habitat Dry, sandy, open or sparsely wooded slopes at moderate elevations to subalpine meadows.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring in the Cascades Range in Washington from Mt Adams south; Washington to central Oregon.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
P. acuminatus, P. attenuatus, P. barrettiae, P. cardwellii, P. cinereus, P. confertus, P. davidsonii, P. deustus, P. ellipticus, P. eriantherus, P. euglaucus, P. fruticosus, P. gairdneri, P. glandulosus, P. hesperius, P. lyallii, P. ovatus, P. palmeri, P. pennellianus, P. procerus, P. pruinosus, P. richardsonii, P. rupicola, P. rydbergii, P. serrulatus, P. speciosus, P. subserratus, P. triphyllus, P. venustus, P. washingtonensis, P. wilcoxii
P. acuminatus, P. attenuatus, P. barrettiae, P. cardwellii, P. cinereus, P. confertus, P. davidsonii, P. deustus, P. ellipticus, P. eriantherus, P. fruticosus, P. gairdneri, P. glandulosus, P. hesperius, P. lyallii, P. ovatus, P. palmeri, P. pennellianus, P. procerus, P. pruinosus, P. richardsonii, P. rupicola, P. rydbergii, P. serrulatus, P. speciosus, P. subserratus, P. triphyllus, P. venustus, P. washingtonensis, P. wilcoxii
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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