Burke: Penstemon fremontii vs. Penstemon deustus

	Penstemon fremontii	Penstemon deustus
		hot-rock penstemon
Habit		Plants with a much-branched, woody base, the flowering stems simple and erect, 2-6 dm. tall; plants usually glandular in the inflorescence, otherwise glabrous.
Leaves		Leaves opposite, ternate, whorled or scattered, sharply toothed to entire; leaves on the short, sterile shoots oblanceolate to elliptic and short-petiolate, those on the flowering stems usually sessile and broad-based, up to 6 cm. long and 2.5 cm. wide.
Flowers		Inflorescence of several verticillasters, often rather loose; calyx 2.5-6 mm. long, the 5 segments lanceolate; corolla dull whitish with some purplish lines within, sometimes washed with lavender, 8-20 mm. long, the tube narrow; staminode glabrous or hairy, not expanded toward the tip; pollen sacs 0.5-0.9 mm. long, glabrous, dehiscent throughout, widely spreading.
Fruits		Capsule 3-5 mm. long.

	Penstemon fremontii	Penstemon deustus
Flowering time		May-July
Habitat		Open rocky roadsides, hillsides, and rock outcrops, sometimes in dry meadows, lowland to middle elevations in the mountains.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah. [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. 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. deustus var. deustus, P. deustus var. variabilis
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: CA, OR, WA Local Web sites: CalFlora, CalPhotos, 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 fremontii

Penstemon deustus

hot-rock penstemon

Habit

Plants with a much-branched, woody base, the flowering stems simple and erect, 2-6 dm. tall; plants usually glandular in the inflorescence, otherwise glabrous.

Leaves

Leaves opposite, ternate, whorled or scattered, sharply toothed to entire;

leaves on the short, sterile shoots oblanceolate to elliptic and short-petiolate, those on the flowering stems usually sessile and broad-based, up to 6 cm. long and 2.5 cm. wide.

Flowers

Inflorescence of several verticillasters, often rather loose;

calyx 2.5-6 mm. long, the 5 segments lanceolate;

corolla dull whitish with some purplish lines within, sometimes washed with lavender, 8-20 mm. long, the tube narrow;

staminode glabrous or hairy, not expanded toward the tip;

pollen sacs 0.5-0.9 mm. long, glabrous, dehiscent throughout, widely spreading.

Fruits

Capsule 3-5 mm. long.