Rock Garden Plants
Penstemon  cardwellii Howell  sect. Dasanthera 
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FamilyPLANTAGINACEAE
Genus species var.Penstemon  cardwellii Howell  sect. Dasanthera
SynonymsPenstemon fruticosus ssp. cardwellii (Howell) Piper
Territory Northwestern U.S.A.OregonWashington
rocky slopes
Altitudemontane
Description leaves glabrous, shortly petiolate, elliptic, 15-35mm long, obtuse, inflorescence racemose, glandular-hirsute, flowers 30-38mm long, outside glabrous, in mouth ca. 1cm wide
Size10-30cm
Colorbluish violet, purple
Bloomsummer
Ca
Typeshrub
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
Picture Picture Picture
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý