Eversporting Varieties. 21 
call a half race, and No. Ill a middle race. The word 
race is obviously not used here in the sense of an im- 
proved rare (Vol. I, p. 80) but simply means a heritable 
form. Instead of middle race I shall usually employ 
the more convenient term of eversporting variety. 1 
Two examples to which reference has already been 
made will serve to illuminate the foregoing discussion. 
EXAMPLES. 
VARIEGATED LEAVES. DOUBLE FLOWERS. 
I. Original species. Green. Simple. 
II. Half -race. Rarely variegated. Occasional petaloid 
stamens. 
III. Eversporting variety. Var. variegata. Var. plena. 
V. Constant variety. Var. aurea. Var. petalomana. 
The parallelism of these two groups rests on the 
assumption that the same character appearing in a state 
of full development would give rise to the constant golden 
and to the fully double varieties; 2 and that it is by their 
mixture with the antagonistic character that variegated 
and half-double varieties arise. The object of this as- 
sumption is solely to present the matter more clearly ; 
for in cases of segregation the characters behave slightly 
differently (see p. 124). 
There are many examples of half races and ever- 
sporting varieties; the former constitute a very con- 
siderable part of the material of teratology and afford 
suitable material for the experimental study of monstros- 
ities. The same holds good for many eversporting vari- 
eties, and I shall have to recur to this point in the second 
part of this volume with especial reference to twisted 
stems and fasciations. Half races as a rule exhibit their 
1 See Species and Varieties, Their Origin by Mutation, Chapters 
XI-XV, pp. 309-459- 
2 See 19 and especially 24 (on variegation). 
