Vegetative Mutations. 
625 
no conclusion concerning this question can be drawn 
from the characters of C. Adanii. 
The view that it is an ordinary hybrid which was 
afterwards grafted on C. Laburnum seems to be much 
more probable. 1 
In other data relating to graft hybrids this view has 
long been proved to be incorrect, as in LINDEMUTH'S ex- 
Fig. 141. Ulmus campestris variegata with atavism by 
bud variation. A branch with larger green leaves has 
arisen at A. 
perfments with potatoes ; or the grafts may have been 
made on hybrid stems, as LAURENT suspects to be the 
case in the Ne flier de Bronvaux? or again, a graft of 
1 The same view is adopted by E. LAURENT, DC I* experimentation 
en horticulture, Brussels, 1902, p. 16. The literature dealing with 
Cytisus Adauii has been given so often that I need not go into further 
detail here. 
2 See the papers on this supposed hybrid between Mcspihis and 
Crataegus in Le Jar din and Journ. Roy. Hort. Soc., 1900, Vol. 24, 
