36 
Latent and Semi-Latent Characters. 
numerous species and genera, either together, or sepa- 
rately. Both are easily influenced by high nutrition and 
selection, but are usually quite distinct and only appar- 
ently connected bv transitional forms. 
5. TRIFOLIUM PRATENSE QUINQUEFOLIUM, AN EVER- 
SPORTING RACE. 
Four-leaved clovers are notoriously rare in nature, 
but it is perfectly easy to have many hundreds of them, 
provided a hereditary race can be obtained. Isolated ex- 
Fig. 3. Tri folium pratense quinquc folium, five-leaved and 
seven-leaved leaves of clover. The left leaf, A, shows 
a transition towards the 6-merotis leaf in the splitting of 
one of its leaflets. 
amples of this race seem to occur sporadically in nature ; 
all that has to be done is to find, to isolate, and to multiply 
them. (Fig. 3.) 
In the following section I shall describe the history 
of a particular race. I shall do so largely with a view to 
emphasizing the contrast between a middle race and a 
