248 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



occurs, in that now the white has eliminated all trace of yellow 

 (derived from the grandparent B. BrooJceanum, and at the same 

 time reduced the crimson (derived from B. Lobbii) to a pure 

 pink. 



Very similar results had been previously noticed to occur in 

 crossing the orange-coloured Begonia cinnabarina with the 

 white B. Dregei ; a pink offspring, B. Weltoniensis, was obtained. 



Fife. 36. — Ehododendron Jasminiflorum carminatum. 



Again, no varieties of colours were obtained from the old bronze- 

 red Abutilon Darwinii until crossed by the white Boule de Neige. 



4. Total Elimination of Colour. — On recrossing Princess 

 Eoyal (pink) with B. jasminiflorum (white), Princess Alexandra 

 (white) was 'obtained (fig. 37). 



In some cases red and yellow eliminate each other, though in 

 others, as stated, and perhaps more generally, they combine to 

 produce orange and scarlet. Thus Purity (French white) is 

 derived from^i?. Teysmannii (golden yellow) x Taylori (pink). 



