Rock Garden Plants
Penstemon davidsonii Greene sect. Erianthera 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon davidsonii Greene sect. Erianthera
Habitatrocks
Altitude30-3700m
Descriptionadpressed pubescent, leaves ovate, glabrous, shortly petiolate, inflorescence compact, few flowered raceme, flowers 20-25mm long, outside glabrous
Size5-10cm
Colorreddish violet
Bloomsummer
Ca
Typesubshrub, carpet
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
Territory Northern America
     Western Canada (British Columbia )
     Northwestern U.S.A. (Oregon , Washington )
     Southwestern U.S.A. (California , Nevada)
BibliographyPlants of the World online powo.science.kew.org
International Plant Names Index www.ipni.org
Comments

PLANTAGINACEAE

Penstemon davidsonii Greene, Pittonia 2(11): 241 (1892)

Synonyms:
Penstemon menziesii davidsonii (Greene) G.N.Jones
=============================================================================
davidsonii typicus ined.

Synonyms:
Penstemon menziesii thompsonii Pennell & D.D.Keck

British Columbia, w. USA
71 BRC 73 ORE WAS 76 CAL NEV

900-3700m

davidsonii menziesii D.D.Keck, Brittonia 8: 247 (1957)

Synonyms:
Penstemon douglasii Hook.
Penstemon fruticosus douglasii (Hook.) C.K.Schneid.
Penstemon menziesii douglasii (Hook.) A.Gray

British Columbia, Oregon, Washington
71 BRC 73 ORE WAS

30-2000m

davidsonii praeteritus Cronquist, Leafl. W. Bot. 10: 129 (1964)

Oregon, Nevada
73 ORE 76 NEV

1500-2900m

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