Penstemon ‘Raven’ from California-GS29042022-1: 6 high res. images.
Penstemon ‘Raven’, a cultivar with deep purple large flowers.
Photographed from Sunnyvale California, 2-12-2010
References:
https://emeraldplants.co.uk/product/penstemon-raven/
https://www.sarahraven.com/products/penstemon-raven
https://www.rhs.org.uk/plants/61638/penstemon-raven-(bird-series)/details
https://www.gardenersworld.com/plants/penstemon-raven/