129 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
another, and how far they seem to have reverted towards their grand- 
parents. Indirectly, too, they serve to illustrate once more the law of 
Partial Prepotency. 
Berberis x stenophylla vars. 1 to 30. 
h=habit, f=form, c=colour. 
(1) B. empetrifolia is prepotent in h and f of stems, h, f, and ¢ of 
spines, in h, f, and ¢ of leaves, and in h, f, and ¢ of flowers. In all, 
favouring that ancestor as 23 : 12, or 65°7 per cent. This form is the 
nearest reversion to B. empetrifolia in the whole batch, but traces of B. 
Darwinii still remain in all the parts, especially in the colour of the 
stems. 
(2) B.empetrifolia is prepotent in h and f of stems, in h of spines, in 
h, f, and ¢ of leaves, and in h of flowers. Altogether favouring that 
ancestor as 19 : 12, or 61:2 per cent. 
(3) B. empetrifolia is prepotent in h, f, and ¢ of stems, in h of spines, 
and in c¢ of leaves; in all, favouring that ancestor as 17: 12, or 58°6 
per cent. 
(4) B. Darwinii is prepotent in h, f, and ¢ of stems, in h, f, and ¢ of 
spines, in f of leaves, and in h, f, and ¢ of flowers; altogether favour- 
ing that ancestor as 22 : 12, or 64°7 per cent. 
(5) B. Darwinii is prepotent in c¢ of stems, and in h, f, and ¢ of 
flowers, while B. empetrifolia predeminates in h of spines and in h and ¢ 
of leaves; in all, favouring B. Darwinii as 16 : 15, or 51°6 per cent. 
(6) B. empetrifolia is prepotent in h, f, and ¢ of stems, in h and ¢ of 
spines, and in h, f, and ¢ of leaves; altogether favouring that ancestor 
as 20 : 12, or 62°5 per cent. 
(7) B. Darwinii is prepotent in f and ¢ of stems, in f and ¢ of leaves, 
and in h, f, and ¢ of flowers, while B. empetrifolia predominates in h of 
leaves ; in all, favouring B. Darwinii as 19 : 18, or 59°3 per cent. 
(8) B. empetrifolia is prepotent in f and ¢ of stems, in h and ¢ of 
spines, in h, f, and ¢ of leaves, and in h and f of flowers, while B. 
Darwinii predominates in ¢ of flowers; in all, favouring B. empetrifolia 
as 21 : 13, or 61°7 per cent. 
(9) B. empetrifolia is prepotent in f of stems, in h and ¢ of spines, in 
h, f, and ¢ of leaves, and in h of flowers, while B. Darwinii predominates 
in f and c of flowers; in all, favourmg Bb. empetrifolia as 19 : 14, or 
57°5 per cent. 
(10) B. Darwinii is prepotent in f of stems, in f of leaves, and in 
f and ¢ of flowers, while B. empetrifolia predominates in ¢ of leaves; in 
all, favouring B. Darwinii as 16 : 13, or 55:1 per cent. 
(11) B. empetrifolia is prepotent in h of stems, in h, f, and ¢ of spines, 
and in f of leaves, while B. Darwinii predominates in f of stems, in ¢ of 
leaves, and in h of flowers; in all, favouring B. empetrifolia as 17 : 15, 
or 53°1 per cent. 
(12) B. empetrifolia is prepotent in f of stems, in h and ¢ of spines, 
in f and ¢ of leaves, and in h of flowers, while Bb. Darwinii predominates 
in h of leaves; in all, favouring B. empetrifolia as 18:13, or 58:0 
per cent. ; 
(13) B. empetrifolia is prepotent in h, f, and ¢ of spines, in h, f, and ¢ 
