Burke: Penstemon dolius vs. Penstemon attenuatus

	Penstemon dolius	Penstemon attenuatus
		taper-leaved beardtongue, sulphur penstemon, taper-leaved penstemon
Habit		Tufted, perennial herbs from a crown, the stem 1-9 dm. tall, glabrous or finely pubescent below the inflorescence.
Leaves		Leaves opposite, deep green, entire, the basal ones well developed, petiolate, up to 17 cm. long and 4 cm. wide, the cauline mostly sessile, reduced upward.
Flowers		Inflorescence of 2-several dense verticillasters; calyx 4-7 mm. long, the 5 segments lanceolate to ovate or obovate, the margins scarious; corolla 2-lipped, glandular-hairy externally, blue or purple to pale yellow or nearly white, 12-20 mm. long, the tube expanded toward the mouth; staminode and raised portion of lower petal bearded; pollen sacs glabrous, becoming opposite.
Fruits		Capsules 6-8 mm. long.

	Penstemon dolius	Penstemon attenuatus
Flowering time		June-August
Habitat		Dry to moist meadows and woodland slopes from the lowlands to the subalpine.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; southeastern British Columbia to northeastern Oregon, east to western Montana and Wyoming. [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. 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
Subordinate taxa		P. attenuatus var. attenuatus
Web links	Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Penstemon dolius

Penstemon attenuatus

taper-leaved beardtongue, sulphur penstemon, taper-leaved penstemon

Habit

Tufted, perennial herbs from a crown, the stem 1-9 dm. tall, glabrous or finely pubescent below the inflorescence.

Leaves

Leaves opposite, deep green, entire, the basal ones well developed, petiolate, up to 17 cm. long and 4 cm. wide, the cauline mostly sessile, reduced upward.

Flowers

Inflorescence of 2-several dense verticillasters;

calyx 4-7 mm. long, the 5 segments lanceolate to ovate or obovate, the margins scarious;

corolla 2-lipped, glandular-hairy externally, blue or purple to pale yellow or nearly white, 12-20 mm. long, the tube expanded toward the mouth;

staminode and raised portion of lower petal bearded;

pollen sacs glabrous, becoming opposite.

Fruits

Capsules 6-8 mm. long.