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Species similar to Clematis vitalba Click here to go back to Ecology tab Clematis flammula In Auckland, Wanganui, Nelson and Canterbury, New Zealand. A deciduous climber that grows with C. vitalba in places; flowers very similar in size and colour to C. vitalba, and in similar compound heads (cymes). It differs in having bipinnate leaves, and the final divisions are lobed rather than toothed. Clematis ligusticifolia The Washington State Noxious Weed Control Board (2003) states that, C. vitalba is similar in appearance to the native C. ligusticifolia, whose range in Washington is east of the Cascades, in sagebrush to ponderosa pine forest, and usually associated with creek bottoms (Hitchcock et al. 1994). Clematis tibetana In central Otago, South Island, New Zealand C. tibetana and C. vitalba grow near each other. C. tibetana was misidentified in Flora of NZ Vol. 4 (Webb et al. 1988) as C. tangutica. The error was pointed out in NZ Journal of Botany 33: 176 (1995), where C. tangutica is said to differ from C. tibetana in its green serrate leaflets and barely spreading petals that are pubescent outside and pubescent within. Like C. vitalba, both are deciduous and have flowers with 4 sepals, though a more creamy-yellow than in C. vitalba and solitary in leaf axils. They also differ from C. vitalba in having leaves bipinnate instead of one-pinnate; C. vitalba usually has just 5 leaflets.