Habit: Small, growing up to 0.6 m in height, erect perennial.
Leaves: Lower in small rosette; leaves opposite, oblong, lanceolate, slightly toothed, sessile and longer than broad. Can grow 3-7 cm. in length.
Stems: Erect or ascending, mostly simple, terete, stiffly hairy.
Flowers: Light purple in color, isolated in the axil of smaller upper leaves, 6-9 mm. in diameter, petal 2-9 mm long, sepals equalling 2/3 of the length of the petals. Stigmas with 4 crossed lobes.
Fruit and seeds: Capsule 3.5-8 cm long, with small and jointed hairs.
Habitat: Native to Eurasia. Typically found in a variety of well-drained soils. Requires moist or wet soil and cannot grow in the shade.
Reproduction: Seeds spread by waterfowl or by wind dispersal.
Credits: The information provided in this factsheet was gathered from GLANSIS.
Individual species images that appear with a number in a black box are courtesy of the Bugwood.org network (http://www.invasive.org). Individual photo author credits may not be included due to the small display size of the images and subsequent difficulty of reading the provided text. All other images appear courtesy of Google (http://images.google.com).