Lonicera caerulea, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 46

1. L. caerulea L. , Sp. Pl. 174 (1753) .

Up to 2 m, glabrous or more or less hairy. Twigs with solid pith. Bark on the older branches yellowish-brown to reddish, flaking. Leaves 2-5-7 x 1-2-3 cm, usually elliptical, sometimes obovate, ovate or oblong, acute or subacute. Peduncle 7-11 mm. Corolla 12-16 mm, yellowish-white, infundibuliform, with a gibbous, pubescent tube. Bracts linear, longer than the bracteoles; bracteoles connate in a tubular cupule enclosing the ovaries, later developing and forming, with the paired ovaries, a succulent, dark blue, compound fruit. N.E. Europe; also from the Pyrenees to Bulgaria & S. W. Czechoslovakia, mainly in the mountains. Al Au Bu Cz Fe Ga Ge He Hs It Ju Rm Rs (N, B, C, W) Su [No]. Very variable in hairiness of twigs, leaves and corolla.