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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 th...