Rock Garden Plants
Penstemon triphyllus Douglas sect. Saccanthera 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon triphyllus Douglas sect. Saccanthera
BibliographyEdwards‘s Bot. Reg. 15: t. 1245 (1829)
Native Rangenw. USA
Primary BiomeTemperate
Habitatrocks
Altitude300-1800m
Descriptionleaves all on stem, to 5cm long, linear to narrowly linear-elliptic, irregularly sharply dentate, calyx viscid, lobes lanceolate, acuminate, flowers 12-15mm long
Size25-80cm
Colorblue, purplish violet
Bloomsummer
Ca
Typesubshrub
Cultivationsunny rock crevices, protection against winter wet
alpine house, poor, drained soil, sun
Propagationseed in spring, barely covered, germ. 1-3 months, 13-18°C
cuttings in late summer
SynonymsPenstemon triphyllus ssp. typicus D.D.Keck
Territory7 Northern America
     73 Northwestern U.S.A. (IDA Idaho, ORE Oregon, WAS Washington)
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(c) 1990-2025 RNDr. Pavel Slabý