Tnfolium Incarnatum Quadrifoliuin. 233 
but not so rare as we might have imagined. I have found 
them almost every year, and often quite soon after I 
had been asked for one. On the other hand there is on 
the market the 5-foliate T. repcns air o pur pur cum which 
is often cultivated in gardens for its dark brown leaves, 
and for T. pratense I have described the five-leaved form 
in detail in 5. 
Plants of T. pratense are sometimes found in the field 
with two or more 4- or multi foliate leaves. I found one 
in 1866 in the Cronesteyn estate near Leyden, and an- 
other in 1886 near Loosdrecht. The first had several 
4-foliate leaves, and also some 5-6-foliate ones. I se- 
cured the former but did not cultivate it; the latter 
formed the starting point of my race. In view of my 
present knowledge I must assume that in both cases the 
plants already belonged to the race when I found them ; 
and I also consider it as probable that this race had arisen 
on these very spots, or at least not far from them. 1 
Whether the same race can also be produced from the 
occasional stray four-leaved clovers I do not, of course, 
know ; but I anticipate that the attempt would sometimes 
succeed and at other times fail. If this view is confirmed 
by future experiments we shall have proof of the exist- 
ence of the two races, the eversporting variety and the 
half-race, existing simultaneously within the limits of a 
single species. For the present we must be satisfied with 
the knowledge that there exists a race rich in anomalous 
leaves in the red and in the white clover, and one in the 
crimson clover which bears the character only in the 
semi-latent state. 
I shall now proceed to the description of the latter. 
In the winter of 1894-95 I bought a kilo of the seed 
1 A polyphyletic origin, therefore, as in Linaria vulgaris peloria. 
