Penstemon

Penstemon is a genus in the family Plantaginaceae.  It is a large genus native to N-America. They are usually low growing herbaceous plants or sub-shrubs with irregularly shaped flowers. They prefer full sun and many are well suited to rock gardens.

Penstemon crandallii
Penstemon crandallii

Crandall's Beardtongue

Crandall's beardtongue is a mat forming, shrubby rock garden plant with blue flowers.

Penstemon fruticosus
Penstemon fruticosus

Shrubby Penstemon

Shrubby penstemon is a low-growing, shrubby perennial with lilac-mauve flowers.

Penstemon pinifolius
Penstemon pinifolius

Pineleaf Penstemon

Pineleaf penstemon is a low-growing, shrubby perennial with bright red flowers.

Penstemon rupicola 'Pink Dragon'
Penstemon rupicola 'Pink Dragon'

Rock Penstemon

Rock penstemon is a low-growing, shrubby perennial with flowers in variable shades of pink or lilac. 'Pink Dragon' is a variety with lilac-pink flowers.

Penstemon serrulatus
Penstemon serrulatus

Cascade Penstemon

Cascade penstemon is a hardy, medium sized perennial with purple flowers.

Penstemon strictus
Penstemon strictus

Rocky Mountain Beardtongue

Rocky Mountain Beardtongue is a medium sized perennial with purple - violet-blue flowers.

Penstemon whippleanus
Penstemon whippleanus

Whipple's Penstemon

Whipple's Penstemon is a medium sized perennial with dark purple flowers.