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.
Thalictrum dunense, Dum, - The habitat of this plant is sandy shores and sand-hills or dunes (hence dunense). The plant is similar in habit to T. minus. The stem is leafless. The floral branches are horizontal or bent down. The panicle is broad and short, with spreading branches.
The habitat of this plant is slightly brackish water, or near the sea. The habit is trailing or floating. The floating leaves are stalkless or stalked, the segments 3-4 lobed, wedge-shaped, the leaves kidney-shaped, broader than long, or with linear, blunt segments. The submerged leaves are 3-forked, with rigid segments. The flower-stalks are long, thick, narrow above, longer than the leaves. The petals do not fall and do not touch, being 7-veined, the flowers white, starlike. The buds are globular, slightly flattened above. The stipules are parallel with the stem. The stamens (15-20) are not longer than the pistil. The stigma is tongue-shaped, the style is straight, persistent below, bent back above. The receptacle is long to conical, thicker than the flower-stalk. The carpels are numerous, half inversely egg-shaped, inflated above. In R. marinus there are no floating leaves. The plant flowers between May and August, and is a herbaceous perennial.
The habitat of this plant is sea cliffs. The Wild Peony has the shrub habit, but is herbaceous. The roots are fleshy, with knobs. The leaves are in threes, with the divisions also in threes. The leaflets are egg-shaped, bluish-green below.. The flowers are crimson. The anthers open inwards, and are yellow. The stamens spring from a glandular disk. The calyx consists of 5 persistent sepals. The petals are 5 or more. The 2-5 follicles are downy, bent back from the base. The seeds are numerous and burst inwards. The plant is 1-2 ft. high, and flowers in May and June, being a herbaceous perennial.