Empetrum L.

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 : 14

2. Empetrum L. 1

Dioecious or hermaphrodite. Flowers in short lateral racemes which bear 3 bracts, of which 1 (rarely 2-3) bears in its axil a sessile flower.