366 MULTIPLICATION. 
petals are likely to be so likewise, and so forth. One 
of the most curious illustrations of this is that recorded 
by Mr. Berkeley’ in a plum, wherein there was an 
increased number of sepals, a corresponding augmen- 
tation in the petals, while the pistil was composed of 
two and sometimes three carpels distinct from the 
calyx and from each other. In the flowers there did 
not appear to be any definite relation in the position 
of the parts either with reference one to another or to 
the axis. 

Fic. 186.—Plum. Increased number of parts in the calycine, corol- 
line, and carpellary whorls respectively. 
In Primulacee this general augmentation has been 
frequently noticed.” 
Among Orchidee the instance related by Dr. Seu- 
bert is worth alluding to here. This botanist observed 
and figured a flower of Orchis palustris with tetra- 
merous arrangement of parts, that is to say there were 
1 «Gard. Chron.,’ 1852, p. 452. ie 
* See Cramer, ‘ Bildungsabweich,’ pp. 16, 24, * 
