 | Siskiyou Evening Primrose. Pink Butterflies In A Groundcover Evening Primrose 'Siskiyou', Oenothera berlandieri 'Siskiyou', displays pale pink cup-shaped flowers up to 3 inches in diameter and smothers this improved selection all summer! 'Siskiyou' is a compact, floriferous, tidy groundcover. It has a spreading habit and spreads from underground runners. Each translucent petal has pronounced veining that resembles the intricate wing of a butterfly; glows when backlit by the sun. 'Siskiyou' is a hardy plant which once established... - Siskiyou Evening Primrose. |