Fig. 1. 
"ig. 2. 
Fig. 3. 
Fig. 4. 
= 
di 
on 
Fig. 7. 
Fig. 8. 
Fig. 9. 
"ig. 10 
EVOLUTION OF THE INFLORESCENCE. 563 
Solitary flower terminal to a main shoot ; 7 s., lateral vegetative shoots. 
Simple dichasium, consisting of terminal flower and two lateral (secondary) floral 
shoots pushed cut from leaf-axils just below the terminal flower. 
Pleiochasium or panicle with the terminal flower blooming first. Some tertiary 
floral axes are represented. 
Ditto, but with terminal flower no longer opening first and with tertiary axes wholly 
suppressed. 
Raceme. Flowers now opening acropetally. Uppermost part of the inflorescence 
arrested in its growth, so that the terminal flower never develops. From the 
raceme the other forms of racemose inflorescences can be derived in the usual 
manner as represented in the plate. 
. Axillary racemes produced after the terminal raceme. Racemes end in minute 
processes, the vestiges of the arrested uppermost parts of the inflorescences. 
Climbing habit assumed. Axillary racemes produced in acropetal succession, 
the terminal raceme never being reached. 
Axillary racemes each reduced to a single flower. 
Flowers now solitary and axillary. 
. Solitary axillary flowers arising in another way from a leafy pleiochasium through 
the adoption of the climbing habit. 
A continuous or compound dichasium. f 
An umbellate cyme derived from the foregoing through internodal compression. 
Note formation of involucre. 
Continuous monochasium derived from Fig. 11, through one-sided development. 
Sympodial cyme through development of false axis. Note the disappearance of the 
barren bracteoles present in Fig. 13. 
. Solitary terminal flowers borne on the subordinate rather than the principal shoots. 
Solitary axillary flowers arising from the foregoing through loss of foliage and 
internodal shortening. . 
An association of solitary terminal flowers on subordinate leafy shoots. 
An intercalary inflorescence arising from Fig. 17, through the reduction of foliage 
leaves to bracts and bracteoles. 
A pseudo-terminal inflorescence derived from Fig. 18 through the abortion of the 
vegetative continuation of the main axis. 
