The Origin of Linaria Vulgaris Pcloria, 215 
filled an entire bed of over 3 square meters in extent, 
with hundreds of vigorous spikes which bore exclusively 
peloric flowers. 
I again obtained only a very small harvest from this 
bed (0.3 cc) ; it was the result partly of artificial and 
partly of insect pollination, the plants flowering in suffi- 
cient isolation. Very few of the seeds germinated (1899) 
and only 32 plants flowered ; 28 of them were peloric 
but 4 were normal. 
The progeny of the peloric race was therefore a mixed 
one, in the three experiments which were continued over 
two generations. It consisted altogether of 3 -\- 75 -p- 28 
= 106 peloric and 5 + 4-(-4 13 normal (including 
hemipeloric) individuals, a total of 119 with about 
atavists. WILLDENOW (see p. 206) also found the peloria 
character inherited, though incompletely. As already 
stated, however, insufficient isolation may have played 
some part in bringing about this result, but hardly to 
such a degree that we might infer from our experiments 
that the peloria comes true. 
If we now look back over this experiment, which 
occupied 13 years, its result may be summarized as fol- 
lows : 
1. Linaria vulgaris hemipelona is a race with an in- 
herited semi-latent character, which manifests it- 
self from time to time among thousands of flow- 
ers, but seldom in more than one instance on a 
plant. It is widely distributed in the wild state. 
2. From it the Linaria vulgaris peloria may arise 
but the conditions under which this happens are 
not yet understood. 
3. This origin is a mutation ; it takes place suddenly, 
and without any visible preparation. Especially 
