Pyrola rotundifolia subsp. rotundifolia

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 : 4

(a) Subsp. rotundifolia :

Leaves ovate, cuneate to rounded at base. Cauline scales 1-2. Pedicels 4-8 mm. Calyx-lobes 3 -5^4-5 mm, linear-lanceolate, acuminate. Anthers 2-3~2-8 mm. Style 6-10 mm. 2n = 46. Woods, bogs and fens. Almost throughout the range of the species.