Prunus

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 78

Subgen. Prunus . Deciduous; leaves convolute in bud. Shoots without terminal bud. Flowers subsessile or shortly pedicellate, solitary or in small, axillary clusters; flower-bud without accompanying leaf-buds. Hypanthium broadly campanulate. Fruit usually glabrous, often pruinose; mesocarp succulent; endocarp smooth or somewhat rugose.