128 FAMILIAR TREES 



Gardeners have added to the many beautiful 

 white, lavender, purple, and red flowers which 

 we have among wild species of Clematis, a vast 

 variety of hybrids, many of which surpass in the size 

 of their blossoms and the purity of their tints all 

 the uncultivated forms. Of these the best known 

 is that universal favourite G. Jackwunni. This is - 

 believed to have been raised by Mr. George Jackman, 

 of Woking, by crossing the European G. Viticella 

 with the Chinese G. lanuginosa, the hybrid first 

 blossoming about 1862. Its large intense violet- 

 purple flowers are produced freely on the shoots of 

 the same year's growth from early summer into late 

 autumn, and are undoubtedly one of the greatest of 

 modern acquisitions to our gardens. Japanese 

 botanists, however, deny the hybrid character of 

 this form, considering it merely a variety of the wild 

 C lanuginosa. Garden hybrids are often grafted 

 on stocks of such common European species as G. 

 Vitalba, G. Viticella, or G. Flammula; but stock 

 and scion sometimes refuse to unite, or start growth 

 in spring at somewhat diiferent times; so that pro- 

 pagation by layering is more satisfactory. 



