EVOLUTION OF THE INFLORESCENCE. 541 
RosacE sz. 
A few examples are to be noted in this family of eymose inflorescences 
with racemose tendencies, such as the ascending order of the blooming of the 
lateral flowers, and the delay in the expansion of the terminal flower, till 
after some of the laterals have opened. 
Rubus fruticosus (the common bramble), In this species the terminal 
flower of the somewhat raceme-like inflorescence expands first, but the 
laterals open on the whole acropetally. 
Crategus Oxyacantha (the common hawthorn). The inflorescence is of 
the nature of a corymbose eyme—a pleiochasium with many tertiary flowers. 
The terminal flower varies as to the time of its expansion. It may be the 
first flower of the inflorescence to open, or its blooming may be deferred till 
later. The writer has noticed the terminal flower of these inflorescences 
opening third, fifth and sixth respectively, besides first. Though to some 
extent the delay in the expansion of the terminal flowers varies directly as 
the density (number of flower-buds) of the inflorescence, it is not always so. 
No very clear acropetal blooming of the laterals is to be noticed in this 
inflorescence. 
Raphiolepis indica—a species of a genus allied to Crategus—has a racemose 
cyme. The terminal flower opens first, but the laterals bloom in the 
ascending order as a rule. No tertiary flowers are produced, though each 
pedicel bears a pair of bracteoles. 
CAMPANULACEA. 
The genus Campanula is of special interest, as it illustrates remarkably 
well the passage from a lax, cymose, panicled inflorescence to a definite 
racemose one, usually of the spicate type. 
This genus from the above point of view would well bear a more extended 
study than the author has been able to vive to it. Below only species are 
dealt with which have come under his personal examination. 
(1) Law Di- or Trichasia. 
Campanula earpatica.—The cluster consists usually of a terminal flower 
and two laterals borne in the axils of bracts. The terminal is naturally the 
first to bloom, the two laterals expanding afterwards in the ascending order. 
Sometimes a fourth flower (a third lateral) issues from the axil of the upper- 
most foliage leaf. The laterals bear a pair of bracteoles each, but no tertiary 
flowers are produced. 
The author is inclined to regard this mode of flower-bearing as one of the 
least evolved in the species directly examined by him. The inflorescence is 
little more than a simple dichasium. The large size of the individual flower 
