Sedum atratum subsp. atratum

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 : 362

(a) Subsp. atratum :

Dwarf; stem unbranched below; petals cream-coloured, lined or suffused with red, acute, only slightly exceeding the sepals. Plant usually dark red. Throughout the range of the species, but rare in the Balkan peninsula.