116 
Atavism. 
of the striped cockscomb or Celosia variegata cristata, 
is traversed by longitudinal stripes of different colors, 
yellow and red according to the variety. Dahlias how- 
ever exhibit the most prodigal wealth of color of all 
variegated flowers, especially those varieties known as 
Fancy-flowers. 1 In this case the color is in some way 
connected with the amount of doubling, which often ex- 
hibits sectorial variations and bud-variations at the same 
time. 2 Striped Dahlias 
give rise to these partial 
variants sometimes very 
rarely, but sometimes in 
such abundance that a 
good variety is often ex- 
posed to the danger of 
being lost thereby. In 
most of the cases we have 
to do with two types which 
are manifested in various 
degrees of association and 
separation. Cases in which 
more than two forms are 
combined and which there- 
fore may produce by bud- 
Fig. 20. Papaver nudicaule. Yel- 
low variety with dark orange 
stripes. 
variation two or more 
types on the same plant, 
besides the normal one, 
have been described; but they were probably hybrids. 
Central dissociation seems to be a very rare phenomenon, 
but of Mad. H. Vonrchy, a variety which usually has 
1 See GROOMBRIDGE'S Treatises on Florist's Flowers; The Dahlia, 
1853, and the extensive literature which has appeared since. 
2 VILMORIN-ANDRIEUX, Les fteurs de pleine terre, first edition, p. 
340. 
