This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of the plant is copses, wet or moist places, brook sides. The habit is erect. The stem is much-branched, brittle, with autumnal stolons, with loosely rosulate leaves in a rosette. The stem is smooth when young, with woolly hairs later, and small, spreading, jointed hairs above. The stems are square-stalked, with 2-4 raised lines, and the wings give strength and conduct moisture. The leaves are long-stalked, alternate, egg-shaped, oblong, narrow above and below, smooth, toothed. The veins are prominent, The buds are nodding, with a narrow, long point. The flowers are numerous, rose-coloured. The calyx has lance-shaped sepals with a long, narrow point. The capsule is downy. The stigma is entire or slightly lobed. The seeds are inversely egg-shaped, oblong, the base rounded. The plant is 9-24 in. high, and flowers in July and August, being a herbaceous perennial.
The habitat of the plant is woods and thickets in hilly districts, shady places. The habit is erect. The plant is smaller and less hairy than the common Enchanter's Nightshade. The plant is usually hairless. The leaves are opposite, shining, deeply toothed, heart-shaped, with a long, narrow point, the margin wavy, toothed. The leaf-stalks are longer and winged, flat, the wings membranous. The bracteoles are bristle-like. The flowers are pinkish-white. The petals are divided nearly to the base, shorter than the membranous sepals, with oblong lobes, narrow below, the calyx hairless. The fruit soon falls. The ovary is 1-celled. The plant is 6-18 in. in height, flowering in July and August, and is a herbaceous perennial.