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COMMON COW-WHEAT Melampyrum arvense (Scrophulariaceae) Height to 35cm. Variable but typically straggly annual that is semi-parasitic on the roots of other plants. Grows on heaths and along woodland rides, and found mainly on acid soils. FLOWERS are 10-18mm long, the corolla pale yellow and flattened laterally, 2-lipped but with the mouth almost closed; in pairs, arising from axils of toothed, leaf-like bracts, these borne in spikes (May-Sep). FRUITS are capsules. LEAVES are narrow, shiny and in opposite pairs. STATUS-Widespread and locally common throughout.