Clematis napaulensis DC.
Synonym(s):
Clematis forrestii W.W.Sm.
Data source(s):
  • Grey-Wilson, C. 2000. Clematis the genus. A comprehensive guide for gardeners, horticulturists and botanists. London, UK: B.T. Batsford Ltd., p.93
  • Walters, S.M., et al. 1989. The European Garden Flora: Vol.3. Dicotyledons (Part 1). Cambridge: Cambridge University Press xv-474 pp.