Clematis 'Jackmanii'

Prior to the introduction of 'Jackmanii', the disease clematis wilt was little known and not widespread. However, because 'Jackmanii' was bred from C. lanuginosa (a species which is susceptible to the pathogen which causes the disease), and because 'Jackmanii' led to a series of similar hybrids and the popularisation of the genus, clematis wilt soon became a serious problem for the new Clematis nurseries, to such an extent that by 1880 it had "brought the industry to a halt". ==References==