Herniaria

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 : 151

Subgen. Herniaria . Annual or perennial. Upper stipules and bracts usually without purplish-black coloration. Flowers 5- merous, or 4-merous in some annual species. Sepals more or less equal.