—_—_— 
548 MR. J. PARKIN ON THE 
development to the full extent, the unforked continuous monochasium would 
appear—also present in this and other families. 
It is, therefore, very probable that the so-called scorpioid cymes of the 
Boraginaeez and Solanaceae have arisen in this fashion, with still further 
modifications in some cases due to concrescences and the suppression of all 
bract-structures. 
Fig. 6, 
O 
0 
E 
Q 
» => 
> 
b PS 
C) 
0 <— 
( 
Q 
oak 
9 
// 7 
O 7—— 
ED <a 
Inflorescence of Silene pendula, a compound dichasium with stpóng tendency to one-sided 
(monochasial) development. Note foreshadowing of8ympodial axes and reduced 
size of barren bracteoles &. |. we 
ch, 
VII. THE ORIGIN oF TP ad AXILLARY FLOWERs. 
In the terminology used by systematists, flowers when borne singly, and 
not in clusters, are denoted either as terminal or axillary with respect to 
their position on the main axis. The flower is considered terminal when it 
ends the shoot, and axillary when it arises in the axil of a foliage leaf borne 
on this shoot. The terminal flower has already been studied at some length, 
and reasons given for regarding it as the starting point of all inflorescences. 
No attempt appears to have been made to trace any connection between the 
