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Penstemon caesius
Penstemon centranthifolius
Penstemon eatonii
Penstemon eatonii var. undosus
Penstemon grinnellii
Penstemon grinnellii var. grinnellii
Penstemon grinnellii var. scrophularioides
Penstemon heterophyllus
Penstemon heterophyllus var. australis
Penstemon labrosus
Penstemon palmeri
Penstemon rostriflorus
Penstemon speciosus
Penstemon spectabilis
Penstemon spectabilis var. subviscosus
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