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Oenothera Yellow

Oenothera Yellow

Oenothera Yellow

Fragrant and showy, Oenothera biennis (Common Evening Primrose) is an erect biennial featuring large, bowl-shaped, lemon-scented, yellow flowers, up to 2 in. across (5 cm), at the top of a stiff, purple-tinged flower stem. Blooming profusely from early summer to early fall, the flowers open in the evening and remain open through late morning. They rise on leafy, branched stems from a basal rosette of oblong, long medium green leaves. This Evening Primrose completes its life cycle in 2 years, its basal leaves becoming established the first year, while flowering occurs the second year. The seeds stay, however, and germinate if the soil is disturbed. The whole plant is edible: the leaves can be cooked as green vegetables and the flowers make beautiful salad garnish!

Oenothera

One of the prettiest species of the genus, Oenothera fruticosa (Sundrops) is an upright clump-forming biennial or perennial boasting showy clusters of large, saucer-shaped, bright yellow flowers, 2 in. across (5 cm), atop reddish, slender, hairy stems clad with lance-shaped green leaves. Blooming profusely from late spring to early summer, the flowers open during the day, hence the common name of sundrops, and give way to club-shaped seed capsules which persist into autumn. They rise from a reddish-purple rosette which is evergreen in mild winter areas. A valuable plant for its ability to grow in poor soils and tolerate drought. Provides a bold splash of color in the summer garden.Yellow Evening Primrose (Oenothera serrulata), a Wisconsin Special Concern plant, is found mostly on steep bluff prairies along the Mississippi and lower St. Croix Rivers, as well as cedar glades and, occasionally, in moist prairies. Blooming occurs late June through early September; fruiting occurs early July through early October. The optimal identification period for this species is late June through early October.

The table below provides information about the protected status - state and federal - and the rank (S and G Ranks) for Yellow Evening Primrose (Oenothera serrulata). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where this species has been found to date and is not meant as a range map.During the first year of growth, the roots can be cooked and eaten. This is by far the most common evening primrose (Oenothera) in Illinois. Although it favors disturbed weedy areas, this species is sometimes found in prairies and other natural areas. Common Evening Primrose can be distinguished from other Oenothera spp. on the basis of its tallness (often exceeding 3' in length), the shape of its seed capsules (rounded edges, rather than sharply angular), the shape of its leaves, and the size of its flowers. There is significant variation in the hairiness of individual plants. For more information about these distinctions, see Mohlenbrock (2002). (Source: www.illinoiswildflowers.info)

 

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