Species: Oenothera pallida ssp. pallida
Encyclopedia of Puget Sound
Pale Evening-primrose is a rhizomatous perennial with whitish, peeling bark and erect or ascending, often branched stems that are up to 2 dm high. The strap-shaped leaves have entire to broadly-toothed margins and short petioles and are 2-6 cm long, becoming smaller up the stem. Foliage is sparsely covered with grayish, appressed hairs. The flowers are borne on their long, stalk-like ovary in the axils of the crowded upper leaves. The flowers have 4 partly united, reflexed sepals that are 1-2 cm long. The 4 white petals become pink with age, are 15-30 mm long, and are wedge-shaped with broad tips. There are 8 stamens and a long style with an x-shaped stigma. Each flower surmounts a 15-35 mm long ovary that matures into a many-seeded capsule.
Source: Encyclopedia of Life
Classification
Dicotyledoneae
Myrtales
Onagraceae
Oenothera
NatureServe
Classification
Ecology and Life History
Pale Evening-primrose is a rhizomatous perennial with whitish, peeling bark and erect or ascending, often branched stems that are up to 2 dm high. The strap-shaped leaves have entire to broadly-toothed margins and short petioles and are 2-6 cm long, becoming smaller up the stem. Foliage is sparsely covered with grayish, appressed hairs. The flowers are borne on their long, stalk-like ovary in the axils of the crowded upper leaves. The flowers have 4 partly united, reflexed sepals that are 1-2 cm long. The 4 white petals become pink with age, are 15-30 mm long, and are wedge-shaped with broad tips. There are 8 stamens and a long style with an x-shaped stigma. Each flower surmounts a 15-35 mm long ovary that matures into a many-seeded capsule.
Source: Encyclopedia of Life