Epilobium alsinifolium is a species of willowherb known by the common name chickweed willowherb. This small flowering plant can be found in European arctic regions and further south in mountainous regions with an Arctic climate, as well as in Greenland.^[1] It is a perennial found in low clumps approximately 10 — 25 centimeters in height. It has wide, rounded basal leaves and narrower leaves further up the stem. It bears purple or pinkish trumpet-shaped flowers, 7 — 12 milimeters in diameter,^[2] and the fruit is a capsule two or three centimeters long.

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