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MARSH LOUSEWORT Pedicularis palustris (Scrophulariaceae) Height to 60cm. Upright, hairless perennial with a single branching stem. Semi-parasitic on the roots of other plants. Grows on marshes and bogs, not exclusively favouring acid soils, hence its occurrence in some fens. FLOWERS are 20-25mm long, the corolla pinkish purple and 2-lipped, the upper lip with 4 teeth; borne in open, leafy spikes (May-Sep). FRUITS are inflated capsules. LEAVES are feathery and deeply divided into toothed lobes. STATUS-Widespread and locally common, least so in E England.