Heritable Pclorias. 
223 
are, however, highly variable and only too frequently 
accompanied by other malformations. The commonest 
of these are an increase in the number of organs, the 
formation of catacorollas and the production of a secon- 
dary raceme from the axis of the flower. These are the 
cases which are most 
commonly described and 
figured in literature. In 
order to find more regu- 
lar and even perfectly 
pentamerous flowers we 
must look to the tops of 
the weak lateral branches 
of vigorous plants (Fig. 
42) ; these hardly ever 
proliferate, are often still 
pleiomerous, but there 
will also occur amongst 
them flowers with a per- 
fectly regular corolla 
with five lips and five 
erect stamens. 
The peloric flowers 
of Digitalis purpurca are 
always terminal, whether they occur on the main stem 
or on branches. The same is true of most other Scrophu- 
SURINGAR, Plantaardige Monstruositcitcn, K. Akad. v. Wetensch., 
Amsterdam, 1873, 2d. R., Vol. VII, Plates I-II 
P. MAGNUS, Digitalis pur pur ea, Sitzungsber. Prov. Brandenb., 
Vol. XXII, 1880, p. 
J. C. COSTERUS, Teratologische Verschynsclcn by Digitalis pur- 
purca, Ned. Kruidk. Archief, 1885, Plate VII. 
ANGEL GALLARDO, Fasciacion, Proliferation y Sinantia, Ann. 
Miis. Nacion., Buenos Aires, Vol. VI, p. 37, PI. 3; also Sobre algunas 
onomalias de Digitalis purpurca (with complete bibliography), same 
journal, Vol. VII, pp. 37-72. 
Fig. 42. Digitalis purpurca mon- 
strosa. A lateral branch with a 
terminal pentamerous peloria. 
