Silene nutans subsp. dubia, (Herbich) Zapal.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 164

(b) Subsp. dubia (Herbich) Zapal. , Rozpr. Wydz. Mat.-Przyr. Polsk. Acad. Urn. (Biol.) ser. 3,11 B: 151 (1911)

( S. dubia Herbich ):

Leaves with short marginal cilia and usually with some 1 - to 2-cellular hairs on surface. Inflorescence-branches usually 1 - to 3-flowered. Calyx-teeth usually distinctly unequal. Petal-claw 2-5-4- 5 mm, with well-developed acute auricle. Capsule 4-5 times as long as carpophore. 2« = 24. • Carpathians.

Treated as a separate species by several authors. Plants from coastal localities in S. England and N. France ( var. salmoniana Hepper ) approach this subspecies in the less hairy leaves and in carpophore/capsule ratio, but do not show the other characters.