Oenothera fruticosa 'Fyrverkeri' (O. f. 'Fireworks') Common Sundrops | | A taller form with clusters of bright yellow flowers in early summer. Stems and buds are reddish for a delightful contrast. |
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| | Oenothera fruticosa subsp. glauca (0. f. youngii, 0. tetragona) Evening Primrose | | Vigorous with bright yellow cup-shaped flowers from June to August. Tolerant of hot dry soils. |
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