Rock Garden Plants
Penstemon  aridus Rydb.  sect. Humiles 
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FamilyPLANTAGINACEAE
Genus species var.Penstemon  aridus Rydb.  sect. Humiles
Territory Northwestern U.S.A.IdahoMontanaWyoming
dry, rocky slopes
Altitude2100-3500m
Description basal leaves glabrous, entire, narrow, 1-5cm long, linear-oblong, inflorescence with few, rather lax, few flowered whorls, flowers 12-18mm long, palate barbate
Size10-15cm
Colorblue
Bloomsummer
Ca
Typetuft
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
division in spring; cuttings in late summer
BibliographyHitchcock, C.L.: Vascular Plants of the Pacific Northwest
USDA Plants Database plants.usda.gov
Picture Picture
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý