Rock Garden Plants
Penstemon aridus Rydb. sect. Penstemon 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon aridus Rydb. sect. Penstemon
Habitatdry, rocky slopes
Altitude1500-2900m
Descriptionbasal leaves glabrous, entire, narrow, 1-5cm long, linear-oblong, inflorescence with few, rather lax, few flowered whorls, flowers 12-18mm long, palate barbate
Size6-20cm
Colorblue
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
Territory Northern America
     Northwestern U.S.A. (Idaho , Montana , Wyoming)
BibliographyPlants of the World online powo.science.kew.org
International Plant Names Index www.ipni.org
Picture Picture
Comments

PLANTAGINACEAE

Penstemon aridus Rydb., Mem. New York Bot. Gard. 1: 348 (1900)

nw. USA
73 IDA MNT WYO

1500-2900m

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(c) 1990-2021 RNDr. Pavel Slabý