540 MR. Je PARKIN ON THE 
Dicentra formosa (fig. 4, A & B) possesses a pleiochasium of four or five 
lateral branches. "The terminal flower is usually the first to bloom, occa- 
sionally the last; afterwards the order of the expansion is inclined to be 
aeropetal. The lateral axes branch diehasially producing tertiary flowers to 
some extent, and even flower-buds to the fourth degree may be formed. 
D. spectabilis (fig. 4, C) has a true raceme. The uppermost part of the 
inflorescence is occupied by a few rudimentary buds, which do not expand. 
lig. 4, 
D 
A. Panicle of Dicentra formosa, terminal flower blooming first; tertiary floral axes produced 
to some extent, 
B. Ditto, but terminal flower blooming sixth. 
C. Raceme of Dicentra spectabilis, flowers opening in acropetal succession. a. Arrested 
uppermost part. Absence of tertiary floral axes. 
D. Raceme of Corydalis lutea. Note absence of bracteoles. f. Terminal filament, repre- 
senting the uppermost part of the inflorescence, which has aborted. 
The lateral floral axes bear only minute bracteoles, no tertiary buds being 
produced. 
This inflorescence is therefore a considerable advance on that of the former 
species. 
In Corydalis lutea (fig. 4, D) and other species of this genus the raceme 
is still more pronounced in that it ends in a minute filament, the remnant of 
the arrested apical part of the inflorescence, and the pedicels are naked, the 
bracteoles having been wholly suppressed. 
