J. J. Simpson 
225 
Another graphic method and the one which we have adopted is as follows. 
Each flower is represented in a table similar to the following : 
Frequency 
Number of 
Diagram 
Stamen 
Filament 
Cliorisis 
Anther 
The first vertical column gives the frequency of the variation or the number 
of individuals examined with this structure. The second vertical column gives 
the number of the corresponding diagram in the plates. The third vertical 
column gives the individual stamens in the positions already defined while the 
other three columns denote the various factors to be considered. The different 
possibilities of variation in these may be shown by the symbols 1, | and 0 as 
already defined. It should be noted, however, that in positions 1 and 2 a dash 
( — ) will be placed in the chorisis column to indicate that these are typically 
non-chorised stamens and that absence of chorisis does not therefore indicate 
abnormality. Representing the same example as before, by this method, we 
would have : 
Frequency 
Number of 
Diagram 
Stamen 
Filament 
Chorisis 
Anther 
1 
1 
2 
3 
i 
1 
4 
1 
1 
5 
1 
1 
6 
1 
1 
The following table shows graphically the types of variations illustrated in 
Figs. I — LVIII, i.e. Class 1, Sub-class A, flowers in which the perianth and 
gyntecium are both normal. 
It will be seen that in the flowers illustrated in Figs. XLVIII— LVIII another 
complication has crept in. Stamens 3, 4, 5 and 6 have themselves sometimes 
undergone partial or total secondary chorisis. In the tables, therefore, by sub- 
dividing the squares containing the details we can thus adhere to our initial 
nomenclature. Let us take the three most difficult examples to illustrate this. 
(1) Fig. XLVIII. The division corresponding to stamen 3 is sub-divided. This 
would indicate that in this position there were actually two stamens. The nature 
of each of these individual stamens is, as before, given in the sub-divisions. In 
