110 THE EVOLUTION OF LIVING BEINGS. 



,,now grows wild in Western Asia some authors 



,,however, entertain much doubt about the single 

 ,,parentage of our cultivated varieties". 



White Mulberry (Morus albus). 

 Vol. I, p. 354. ,,In India the mulberry has also 

 ,,given rise to many varieties. The Indian form is 

 ,,thought bij many botanists to be a distinct spe- 

 ,,cies, but as Royle remarks, so many varieties 

 ,,have been produced by cultivation that it is dif- 

 ,,ficult to ascertain whether they all belong to one 

 ,,species. 



The orange group. 



Vol. I, p. 355. ,,We here meet with great confusion 

 ,,in the specific distinction and parentage of the 

 ,,several kinds." 



Peach and Nectarine (Amygdalus persica). 

 Vol. I, p. 360. ,,Whether or not the peach has procee- 

 ,,ded from the almond, it has certainly given rise to 

 ,,nectarines." 



Apricot (Prunus armeniaca). 

 Vol. I, p. 365. ,,It is commonly admitted that the 

 ,,tree is descended from a single species, now found 

 ,,wild in the Caucasion region." 



Plums (Prunus insititia). 



Vol. I, 366. ,,Formerly the sloe, P. spinosa, was 

 ,,thought to be the parent of all our plums but now 

 ,,this honour is very commonly accorded to P. in- 

 ,,sititia or the bullace, which is found wild in the 

 ,,Caucasus and N. Western India another sup- 

 posed parent-form, the P. domestica is said to be 

 M found wild in the region of the Caucasus." 



