Rock garden plants Penstemon  ambiguus Torr.  sect. Ambigui 
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FamilySCROPHULARIACEAE
Genus species var.Penstemon  ambiguus Torr.  sect. Ambigui
SynonymsLeiostemon ambiguus (Torr.) Greene
 Penstemon laevissimus (D.D.Keck) N.H.Holmgren (var.)
Territory NC.USA; NW.USA; SC.USA; SW.USA
american prairie
Description stems glabrous, difusely ramose, leaves linear, mucronate, bracts subulate, floral peduncles opposite, 1-3-flowered, calyx glabrous, lobes ovate, shortly acuminate, corolla 20mm
Size40-60cm
Colorpink-white
Bloomsummer
Ca
Typelax shrub
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
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