William Curtis, The Botanical Magazine — 65
“ The Clematis integrifolia is not an uncommon plant in the nurseries about London, and is deserving a place in gardens, if not for the beauty of its flowers, at least for their singularity.It is a native of Germany, flowers in July, and is one of those hardy perennials which suit most people, requiring little more than an introduction.Is propagated by parting its roots in Autumn. ”
