Pipestem Clematis  or Chaparral Clematis is a deciduous  dioecious vine  that grows to 8-20' and has small but showy  creamy white flowers from March-August. Chaparral clematis is native in the coast ranges and Sierra Nevada mountains. Chaparral Clemaitis is easy to grow  and grows fast up to 15 feet if there are trees or bushes that it can wind through. It prefers part shade  but will tolerate full shade though grow more slowly.