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 copses, streams, bushy hilly places. The plant has the rosette habit more or less. There is a short, creeping rootstock. There are no hairs on the stems, or the plant may be downy and glandular above, hollow, angular, leafy, simple. The leaves are alternate, pinnate, with 6-12 pairs of nearly stalkless leaflets, with a short-winged stalk. The leaflets are entire, ovate, oblong to lance-shaped, acute or blunt, The flowers are numerous, drooping, blue or white, in a downy glandular panicle. The calyx is bell-shaped, with oblong, acute lobes. The lobes of the corolla are spreading, more or less acute. The capsule is erect and included in the calyx. The seeds are angular, flattened at the border, with a winged, rough testa. The plant is 1-3 ft. high, flowering in June and July, and is a herbaceous perennial.