356 Tricotylous Races. 
from a group like this the plants with the smallest values 
are selected for the continuation of the culture, values 
which are equal to or even smaller than the best ones of 
the half race can be obtained. Here also the variability 
is of the transgressive kind; but it does not result in the 
transition from one race to the other. 
Half races and intermediate races are, therefore, with 
regard both to the forms of their individuals and the 
magnitude of their hereditary capacities highly variable 
races. On the other hand they are perfectly constant 
inasmuch as neither race can be transformed into the 
other artificially. They behave like the majority of ever- 
sporting races of other anomalies. 1 
2. TRICOTYLS, HEMI-TRICOTYLS, AND TETRACOTYLS. 
The opinion, prevalent amongst gardeners, that hy- 
brids are intermediate in form between their parents, and 
that intermediate types, therefore, should be regarded 
as hybrids, might easily lead to the assumption that the 
hemi-tricotyls are hybrids between tricotyls and dicotyls. 
Intermediate they are without any doubt, especially when 
the cotyledons are cleft over half their length. But the 
occurrence of a continuous series of intermediate forms 
between di- and tricotylous plants proves the incorrect- 
ness of this view, or at least indicates that it does not 
cover all the facts. The question has to be decided by 
experiment. For this reason I have made a series of 
crosses between dicotyls of a half race, and tricotyls of 
the corresponding intermediate race. Although I always 
paid especial attention to the occurrence of hemi-tricot- 
ylous seedlings amongst their results, they were just as 
1 See above, p. 22. 
