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 this plant is moist meadows. It has a large II rhizome, twisted (hence Snakeweed). The habit is erect. The stem is simple, with egg-shaped leaves, almost heart-shaped below, wavy, bluish-green below, the leaf-stalk winged. The flowers are in a dense terminal spike, the flowers white or pink, the fruit brown, polished. The plant is 1-2 ft. in height, and is in flower between June and September. It is a herbaceous perennial.
The habitat of this plant is wet meadows or other places, waste places. The habit is erect, branched, spreading, the stem slender, with egg-shaped, lance-shaped leaves, heart-shaped below, which are not narrowed above the base. The flowers are in distant leafy whorls. The perianth segments or sepals are enlarged, and are oblong, entire, linear, nearly acute, or toothed at the base, and bear 2 oblong tubercles. The flower-stalks are jointed below the middle. The stem is tall, 1-3 ft. high. Flowers may be found from June to October, and the plant is a herbaceous perennial.
The usual habitat of this plant is meadows and pastures, or woods. The habit is erect. The stem is slender and simple. The lower leaves are arrow-shaped on long stalks, the lobes rounded not spreading, bluish-green below, the upper stalkless. There are brownish stipules, toothed, torn. The leaves are acid. The plants are dioecious, the males on one, females on another plant. The outer sepals are turned back in fruit, the inner rounded, with a membranous border, with small tubercles. The fruit is smooth and brown. The height is 1-2 ft. It is in flower from May to August, and is a herbaceous perennial.