Penstemon ( John Nash Penstemon )
The genus Penstemon is made up of 250 mintage of deciduous , semi - evergreen , and evergreen perennials and subshrubs , and numerous cultivar which tend to be semi - evergreen . Leaves are narrow , up to 3 inches long , or large and ovate , to 5 inches long . raceme or panicles of foxglove - like flowers are produce from former summertime to mid fall . ‘ John Nash ’ is a shaggy - growing cultivar with white - throated flowers in shades of pink to mauve - purpleness ....