Vegetative Mutaiioiu 



625 



no conclusion concerning this (juestion can be drawn 

 from the characters of C. Adauii. 



The view that it is an or(hnary hybrid which waj 

 afterwards grafted on C. Labiirtimn seems to be much 

 more prol^able.-^ 



In other data relating to graft hybrids this view has 

 long been proved to be incorrect, as in Lin dem urn's ex- 



Fig. 141. Ulinus canipestris varicgata with atavism by 

 bud variation. A branch with larger green leaves lias 

 arisen at A. 



periments with potatoes; or the grafts may have been 

 made on hybrid stems, as Laurent suspects to be the 

 case in the Neflier de Bronvaux'r or again, a graft uf 



^The same view is adopted by E. Laurent, Dc I'cxpcn'ninilatioii 

 en horticulture, Brussels, 1902, p. 16. The literature dealing with 

 Cytisns Adami has been given so often that 1 need not go into further 

 detail here. 



" See the papers on this supposed hybrid between Mcspilus and 

 Crataegus in Le Jardin and Jonni. Roy. Hort. Soc., 1900. Vol. 24, 



