The Origin of Linaria J^ul (juris Pcloria. 203 
accessible to investigation the mode of its appearance 
and the external causes to which it is due. 
For these reasons I have endeavored to induce the 
occurrence of the Pcloria from the ordinary form in my 
experimental garden. It is obvious that the success of 
such an experiment, at least at first, is dependent on 
chance. This chance however can be favored by making 
the cultures as extensive as possible, and by widely vari- 
able conditions of life. Fortune has favored me, and 
after seven years' work my 
object has been attained. 
ThePeloria appeared quite 
suddenly in the fifth and 
sixth generation of my 
culture. 
The signification of 
my observations will be 
more properly understood 
if I premise my account 
of them with a short gen- 
eral and historical account 
of the subject, referring Fi s- 38. A B Linaria vulgaris. 
J . C, D, Pelonc flowers. 
the reader for the litera- 
ture to the following section (21) and to PENZIG'S 
TeratologieS 
Peloric flowers in Linaria I'ulgaris' 2 were first dis- 
covered, as is well known, in 1742 by ZIOBERG on an 
island near Upsala and described by LINN^US in the 
1 O. PENZIG, PHanzciv-Teratologic, Vol. II, p. 195. 
! The Pelorias have five spurs: Pcloria ncctaria. But there is 
also a Peloria ancctaria in which the flowers are regular but without 
spurs. See PENZIG, loc. cit., and VERLOT, Production des varictcs, 
p. 90. This variety is nearly sterile, setting very little seed, but it 
breeds true. 
