226 Observation of the Origin of Varieties. 
Lamiwn inacnlatuin and Galeobdolon luteiun commonly 
produce peloric flowers in the neighborhood of Vienna. 
They often bear them every year on the same plant, but 
one or more years are sometimes skipped. A sunny 
position increases the number of anomalous flowers whilst 
dense shade diminishes it ; consequently one locality often 
furnishes instances of peloria in several species of Lab- 
iates (e. g., Calainintha and others), whilst the same 
species growing together in another locality will not pro- 
duce a single symmetrical flower or only very few. When- 
ever the conditions affecting a plant were improved by 
cutting down timber, peloria occurred in profusion, and 
the transference of a plant to a sunny spot in a garden 
often resulted in its appearance. Other authors, and 
particularly VUILLEMIN/ also assert that the conditions 
of life play an important part in inducing the anomaly, 
provided that the inherited potentiality for it is present. 
bildungen, Denkschr. d. k. Akad., Vienna, Vol. XXXVIII, Part II, 
1877, with Plates I- VIII. See also GOEBEL, Organo graphic, I, p. 163. 
1 Loc. cit., 1894, P- 33- 
