Tips on growing clematis--did you know they can't climb wooden trellises? They don't twine; they wrap, so any support thicker than 1/2 inch won't work. Use twine or trellis netting to give the illusion of climbing on your wooden trellis.
Akebia longeracemosa "A collection from N. Taiwan. This makes a vigorous twining climber with semi-evergreen leaves composed of 5 slim leaflets. The scented blackish-maroon flowers are borne in pendulous racemes to 15cm long in spring. Purplish sausage shaped fruits can follow in autumn. Sun or semi-shade."