This is a group of over 250 species of herbaceous perennials and shrubs that are native to the Midwest and Rocky Mountain area of the United States. They have opposite or whorled leaves and brightly colored tubular flowers in terminal racemes during the summer. The plants grow from low clumps of dark green or maroon foliage from which the flower stalks emerge.PGC-P-Penstemon-barbatus-Navigator-2010-01

The name is Greek for penta (5) and stemon (stamens) because the flowers have 5 stamens with 4 being fertile and 1 being sterile. The common name comes from the throat of the flowers which are hairy.




Penstemon alpinus Alpine Penstemon
P. azureus Azure Penstemon
P. barbatus Bearlip Penstemon
P. barrettise Barrett Penstemon
P. caespitosus decumbent Mat Penstemon
P. campanulatus  
P. cobaea Cobaea Penstemon
P. cyananthus Wasatch Penstemon
P. davidsonii Davidson Penstemon
P. digitalis white Penstemon
P. fruticosus Bush Penstemon
P. x glaxinoides Beardlongue
P. gracilis Slender Penstemon

P. grandillorus

Sheilleaf Penstemon

P. hartwegii Hartweg Penstemon
P. heterophyllus Chaparral Penstemon
P. hirsutus Hairy Beardlongue
P. menziesil = P. davidsonii menziesii
P. murrayanus Cutleaf Penstemon
P. ovatus     Eggleaf Penstemon
P. palmeri Palmer Penstemon
P. pinifollus  
P. procerus tolmiel Tolmie Penstemon
P. rupicola Cliff Penstemon
P. scouberi = P. fruticosus scouleri
P. spectabilis Showy Penstemon
P. strictus Beard Tongue
P. tobmiel = P. procerus tolmiei
P. torreyi = P. barbatus torreyi
P. unllateralis Oneslde Penstemon

Species Hgt (in) Flower Color
P. barbatus 18-36 Pink, rose
P. campanulatus 18-24 Various
P. x glaxinoides 18-24 Red, scarlet

* Guides and Keys are from the book "Herbaceous Perennial Plants A Treatise on their Identification, Culture and Garden Attributes" by Dr Allan M. Armitage of the University of Georgia. Varsity Press, Athens, Georgia. 1989 ISBN 0-942375-00. More on Dr Armitage and his other books.


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