Epilobium anagallidifolium is a species of willowherb known by the common names pimpernel willowherb and alpine willowherb. This small flowering plant has a near-circumboreal distribution and can be found in mountain ranges further south, where grows in alpine climates. It is a perennial found in low clumps rarely exceeding 20 centimeters in height.
Description This species has an unbranched stem rising to 150 cm high. The leaves are lanceolate, alternate and have a short stalk.Webb, D.A., Parnell, J. and Doogue, D. 1996. An Irish Flora. Dundalgan Press Ltd. Dundalk. It has wide, rounded basal leaves and narrower leaves further up the stem, and its foliage is often hairy. It bears purple or pinkish trumpet-shaped flowers and the fruit is a capsule two or three centimeters long.
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Jepson Manual Treatment Photo gallery