Sentences with phrase «of penstemons»

In the case of penstemons, with over 200 species to choose from, scientists Carolyn Wessinger and Mark Rausher have now shown that turning their flowers from blue to red involves knocking out the activity of just a single enzyme involved in the production of blue floral pigments.

Not exact matches

There are many varieties available but the bright pink flowers of foxgloves are an absolute delight as are penstemons (which will flower even if temperatures drop to minus fifteen!)

A variety of so - called long - tubed flowers, including penstemon, Indian paintbrush, clover, wild indigo, monkshood, bluebell, snapdragon, larkspur, and foxglove, require long - tongued bumblebees for pollination.

The view here shows various island beds of ligularia, linaria, monarda, rose, penstemon, achillea, anthemis, hardy geranium, salvia and lily.

Try purple penstemons and salvias, with yellow dahlias, against a backdrop of dark - leaved foliage plants, such as Physocarpus opulifolius «Diablo».