C. rehderiana

From western China. This highly scented species is hard to fit into the normal clematis descriptions. The 0 .5"(12mm) nodding flowers open yellow then turn the color of parchment and hang in clusters to make a very showy display. If left to wander they will cover a small tree with 15-20' (4.4-6m) of growth. If pruned to about 2' (60cm)from the ground each spring, you can expect an excellent display on an 8-10'(2.5-3m) plant. Pruning group A or C