Rock Garden Plants
Penstemon  platyphyllus Rydb.   
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FamilyPLANTAGINACEAE
Genus species var.Penstemon  platyphyllus Rydb. 
Territory Southwestern U.S.A.NevadaUtah
rocky slopes
Altitude1500-2400m
Description leaves elliptic, to 6cm long and 15mm wide, young shoots pubescent, glabrous, bright green, flowers in raceme, floral pedicels glabrescent, flowers to 25mm long
Size15-80cm
Colorblue, 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
BibliographyCronquist, A. et al. (1972-2005) Intermountain Flora
USDA Plants Database plants.usda.gov
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý