Woodsorrel
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leaves are edible raw.
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leaves have a sour taste.
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flowers are edible raw.
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leaves and flowers are safer and tastier when cooked.
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varieties in the Pacific Northwest include Creeping woodsorrel (Oxalis corniculata), Stoloniferous woodsorrel (Oxalis dillenii) and Upright woodsorrel (Oxalis stricta).
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grows in disturbed sites.
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raw leaves and raw flowers contain oxalic acid, which can cause nutritional deficiency in high doses.