Cuscuta gronovii, Willd.

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 : 76

4. C. gronovii Willd. in Roemer & Schultes, Syst. Veg. 6: 205 (1820).

Stems stout. Flowers 3-4 mm, 5-merous, more or less glandular, in lax or dense clusters. Calyx campanulate, shorter than corolla-tube; lobes ovate, obtuse, overlapping, often with uneven edges. Corolla-lobes mostly shorter than the tubular-campanulate tube, ovate, obtuse, deflexed. Stamens somewhat exserted. Scales about as long as tube, narrow, long-fimbriate. Ovary ovoid-conical, thickened at apex. Styles somewhat shorter than ovary, thickened below. Capsule globoseconical or pyriform, capped by the detached corolla. Mainly on Salix, Populus and other trees, especially on river-banks. Naturalized mainly in W. & C. Europe. [Be Bu Cz Ga Ge Ho It Po Rs (W).] (C. & E. North America.)

In Europe only as var. calyptrata Engelm.