Rock Garden Plants
Penstemon retrorsus Payson sect. Caespitosi 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon retrorsus Payson sect. Caespitosi
Habitatrocky slopes
Altitude1500-2500m
Descriptioncinereous, leaves oblanceolate or spathulate, 8-15mm, flowers 15-20mm in interrupted spike, corolla tubular, staminodium apically densely barbate
Size10-20cm
Colorblue
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
     Northwestern U.S.A. (Colorado)
BibliographyPlants of the World online powo.science.kew.org
International Plant Names Index www.ipni.org
Comments

PLANTAGINACEAE

Penstemon retrorsus Payson, Contr. U.S. Natl. Herb. 20: 373 (1920)

Colorado
73 COL

1500-2500m

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(c) 1990-2021 RNDr. Pavel Slabý