556 MR. J. PARKIN ON THE 
the genus Ononis. Examples of such solitary axillary flowers have come to 
the writer’s notice in the genera Vicia (V. sativa), Cytisus (C. scoparius), 
Pisum, and Lathyrus. 
The Labiatæ may be mentioned as another family affording examples of 
such solitary axillary flowers, 
VIII. INTERCALARY AND PSEUDOTERMINAL INFLORESCENCES. 
Finally, consideration is to be given to a type of inflorescence quite 
different in character from any of the foregoing—in fact, to a form of flower- 
cluster which has hitherto been largely disregarded by morphologists. 
So far, the inflorescences considered in this paper have had either a 
terminal or an axillary position, but the kind of flower-cluster now to be 
studied has quite a different arrangement. The flowers are grouped together 
on an axis whieh bears foliage leaves, not only below the cluster, but also 
above. That is to say, the axis, after emitting a cluster of flowers laterally, 
continues its apical growth vegetatively. Thus the flower-bearing part of 
the axis is, as it were, interealated between two foliage-bearing portions. 
The term intercalary is, therefore, proposed for such a type of inflorescence. 
Some of the Australian Myrtacere, e. gy the genera Callistemon and Metro- 
sideros, furnish good instances of intercalary inflorescences. 
If in such an inflorescence the vegatative continuance of the main axis 
should cease and all traces of it finally disappear, then a falsely terminal 
flower-cluster would result. The author believes that these exist, and may 
be by no means uncommon in Dicotyledons. For such inflorescences, 
derived in this way from the interealary type, he proposes the name 
pseudoterminal. 
Intercalary inflorescences appear capable of being derived from solitary 
axillary flowers (or it may bs, from solitary axillary clusters). When a 
number of axillary flowers (or axillary inflorescences) become grouped 
together, and when their subtending foliage-leaves become reduced to braets, 
an intercalary inflorescence will be produced. 
Descriptions now follow of a few interealary inflorescences, showing in 
some instances their conversion into pseudoterminal inflorescences, and in 
one example their probable origin from the clustering together of separate 
axillary inflorescences. 
MaGNoLIACEE.— This primitive family has been shown already in this 
paper to contain, not only plants with solitary terminal flowers ( Magnolia for 
the most part, Liriodendron, ete.), but also ones with solitary axillary flowers 
(Michelia). It further affords examples of interealary inflorescences. The 
flower-clusters in the interesting genus Drimys are of this nature. 
Let us examine a typical inflorescence of Drimys Winteri (fig. 9). Super- 
ficially it bears some resemblance to a compound umbel, but in reality it is 
