Parthenocissus inserta, (A. Kerner) Fritsch

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 : 247

2. P. inserta (A. Kerner) Fritsch , Exkursionsfl. Österr. ed. 3, 321, 789 (1922)

( P. inserens Hayek , P. vitacea (Knerr) A. S. Hitchc. , P. quinquefolia auct. eur. med., non (L.) Planchon).

Like 1 but leaflets more acutely serrate and shining green beneath; tendrils longer, with 3-5 branches, clinging by coiling or by swelling of the apex inside a crevice, but without adhesive disc; inflorescences all leaf-opposed, smaller, and with conspicuously dichotomous branching. Widely cultivated for ornament and frequently naturalized. [Au Cz Da Ga Ge Ho Hu It Ju Po Rm.] (S. Canada, N. & W. parts of U.S.A.)

Hybrids between 1 and 2 have been reported, and it is possible that some of the naturalized plants are hybrids.