Rock Garden Plants
Penstemon  ambiguus Torr.  sect. Ambigui 
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FamilyPLANTAGINACEAE
Genus species var.Penstemon  ambiguus Torr.  sect. Ambigui
SynonymsLeiostemon ambiguus (Torr.) Greene
Territory Northwestern U.S.A.North-Central U.S.A.Southwestern U.S.A.South-Central U.S.A.
american prairie
Description stems glabrous, difusely ramose, leaves linear, mucronate, bracts subulate, floral pedicels opposite, 1-3-flowered, calyx glabrous, lobes ovate, shortly acuminate, corolla 2cm
Size30-60cm
Colorpinkish white, white
Bloomsummer
Ca
Typesubshrub
Cultivationsunny site with a deep, drained soil
alpine house, rich, drained soil, sun
Propagationseed in spring, barely covered, germ. 1-3 months, 13-18°C
green cuttings in late summer
BibliographyCronquist, A. et al. (1972-2005) Intermountain Flora
USDA Plants Database plants.usda.gov
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý