Plate , 1. <i>Clematis aureliana</i> and 2. <i>Clematis sofia</i> rom <a href="//commons.wikimedia.org/wiki/Favourite_Flowers" class="mw-redirect" title="Favourite Flowers">Favourite Flowers</a> or <i>Favourite flowers of garden and greenhouse by Edward Step, F.L.S. the cultural directions edited by William Watson F.R.H.S. Assistant Curator, Royal Gardens, Kew; illustrated with three hundred and sixteen coloured plates, selected and arranged by D. Bois Assistant chaire de culture au Museum d'Histoire Naturelle de Paris., Vol 1</i>
<bdi><a href="https://en.wikipedia.org/wiki/en:Edward_Step" class="extiw" title="w:en:Edward Step"><span title="British naturalist (1855-1931)">Edward Step</span></a>
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<a rel="nofollow" class="external text" href="http://explore.searchmobius.org/record=b1195640~S1">Missouri Botanical Garden</a><a rel="nofollow" class="external text" href="https://archive.org/details/mobot31753000580800">The Internet Archive</a>