Filipendula ulmaria subsp. ulmaria

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 6

(a) Subsp. ulmaria :

Stem up to 200cm, glabrous at least below. Leaflets ovate to ovate-suborbicular, plane, crenateserrulate to shallowly biserrate, acute with a broadly triangular apex, sparsely to densely white-tomentose beneath. Inflorescence lax. Achenes glabrous. Usually in damp or wet places. Throughout the range o f the species.