Are Clematis Self Clinging?

Are Clematis Self Clinging? Twining climbers ascend by wrapping themselves around poles, wires or trellis; examples include Honeysuckle, Clematis, Jasmine and Wisteria. These are not so adaptable so do need a framework or structure to which they can cling to and climb over. Wall shrubs, by contrast, do not naturally climb. Are any clematis self