EVOLUTION OF THE INFLORESOENCE. 543 
(4) Campanula pyramidalis. 
This species has a very long, moderately compact, many-flowered inflor- 
escence ; and differs from those described in the foregoing group in that the 
tertiary flowers are not suppressed, but greatly developed in a regular 
Fig, 5. 
| 6 
a Q Q Bo T 
EN 8 4° 9 I0 o... 
5 Ae ; 29 
` 4 "Os, 
5 < f 
SY. € 
xus SL E 
DO A2 + S 
p 
Ë 
A sd C 
A. Panicle of Campanula rotundifolia, terminal flower first to open, tertiary flowers 
yi , pen, 
produced to some extent. 
B. Racemose panicle of C. rapunculoides, terminal flower opening sixth. Tertiary axes 
p /! , I g 
largely suppressed, 
C. Ditto, but panicle has become a true raceme with arrested uppermost part. 
H P I» 
) 
manner. The terminal flower-bud of the whole inflorescence is the last to 
open, or it may never expand at all—-a result agreeing with the general view 
expressed in this paper that as the number of secondary floral shoots increase, 
so is delayed the blooming of the terminal flower, until it ceases to open at 
all and finally aborts. 
LINN, JOURN.—BOTANY, VOL. XLII. 2 P 
