248 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
As evidence of this I quote, for example, the following experiments : 
— Trifolmm pratense album was crossed with Trifolium ])Tatense quin- 
qitefolium ; the white flowers and trifoliate leaves are, as against the 
antagonistic specific characters, recessive. The offspring of the cross I 
found to be — 
Calculation 
1. Red and trifoliate, 13 per cent. . . 19 per cent. 
2. White and quinquefoliate, 20 per cent. . 19 ,, 
3. Eed and quinquefoliate, 61 per cent. . 56 „ 
4. White and trifoliate, 5 per cent. . . 6 „ 
about 220 plants being concerned. 
In similar fashion are the calculations and experiments to be made 
respecting Tri-Polyhybrids. 
It frequently happens that by experiments in separation, simple 
characters are split up into several factors. For instance, the colour of 
the flowers is often composite, and we obtain after crossing the single 
factors partially separated and partially in various blends. 
I have effected such splitting up in Antirrhinum majus, Silene 
Armaria, and Brunella vulgaris, and by so doing found the above 
numerical proportions confirmed. For instance, the red Antirrhinum 
majus crossed with the white splits up into these two and into yellow 
with red (Brillant) and white with red (Delila). Silene Armeria into red, 
rose, and white. Brunella vidgaris forms a constant white flowering 
and brown caliced intermediate type. 
From these and numerous other experiments I deduce that the law of 
separation in crosses, discovered by Mendel for Peas, has a very general 
application to the vegetable kingdom, and that it has a paramount 
significance in connection with the study of the units of which the 
specific characters are made up. 
