Pedicularis palustris subsp. palustris

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 272

(a) Subsp. palustris :

Stem freely branched, with lower branches considerably longer than upper, giving a pyramidal outline to plant. Leaf-segments pinnatifid; rhachis of leaf c. 2 mm wide, flat. Corolla 18-25 mm. Throughout the range of the species except parts of the north.