Rock Garden Plants
Penstemon humilis Nutt. ex A.Gray sect. Penstemon 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon humilis Nutt. ex A.Gray sect. Penstemon
BibliographyProc. Amer. Acad. Arts 6: 69 (1862)
Native Rangew. USA
Primary BiomeTemperate
Habitatrocky slopes
Altitude1000-3200m
Descriptionfinely cinereous, leaves entire, basal leaves persistent, lanceolate to ovate, to 12cm, stem leaves reduced, inflorescence verticillate, few flowered, flowers 12-19mm
Size5-40cm
Colordark blue
Bloomsummer
Ca
Typeperennial
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
division in spring; cuttings in late summer
SynonymsPenstemon cinereus Piper
Penstemon cinereus ssp. foliatus D.D.Keck
Penstemon cinereus ssp. typicus D.D.Keck
Penstemon collinus A.Nelson
Penstemon decurvus Pennell ex Crosswh.
Penstemon humilis var. desereticus S.L.Welsh
Penstemon humilis ssp. typicus D.D.Keck
Penstemon puberulus M.E.Jones
Territory7 Northern America
     73 Northwestern U.S.A. (COL Colorado, IDA Idaho, MNT Montana, ORE Oregon, WAS Washington, WYO Wyoming)
     76 Southwestern U.S.A. (CAL California, NEV Nevada, UTA Utah)
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