Compact and floriferous, Oenothera speciosa 'Siskiyou' (Evening Primrose) is a neat perennial featuring masses of large, 2 in. across (5 cm), saucer-shaped, rose-pink flowers adorned with a white center and a greenish yellow throat. They rise on erect to sprawling stems atop rosettes of oblong to lance-shaped, toothed, medium green leaves.