Rock Garden Plants
Penstemon  triphyllus Douglas  sect. Saccanthera 
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FamilyPLANTAGINACEAE
Genus species var.Penstemon  triphyllus Douglas  sect. Saccanthera
Territory Northwestern U.S.A.IdahoOregonWashington
dry rocks and scree
Altitudemontane
Description leaves 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, dry, 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
BibliographyHitchcock, C.L.: Vascular Plants of the Pacific Northwest
USDA Plants Database plants.usda.gov
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý