Clematis ligusticifoliawestern virgin's bower. Difficult to separate this species from C. lasiantha by photos alone. My standard for identification in this case is the blooming season, which happens to be later for C. ligusticifolia. Photographed in a private garden in Berkeley, CA
2008.10.04: Austria, Vienna XXII. district, 154 m AMSL, heath (Lobau Heisslnde).Flowering in june/july and depending on weather till september: fruits/habitat (on Crataegus monogyna).Very common in lower lying regions wherever there are bushes or trees to climb.German names: Gewhnlich-Waldrebe, Weisse Waldrebe, Weissrebe, Herrgottsbart.