Penstemon virens

Penstemon virens by paloma (http://creativecommons.org/publicdomain/zero/1.0/)

Penstemon virens by spacecowboy (http://creativecommons.org/licenses/by/4.0/)

Penstemon virens by Ashwin Srinivasan (http://creativecommons.org/licenses/by/4.0/)