io8 Salisbury . — Variation in Anemone apennina , Z., and Clematis 
figures (cf. Fig. a) show an asymmetrical form where the average of the 
strain was five petals but an almost symmetrical form in the selected strain 
where the average number was nine. 
In the one hundred and fifty flowers whose parts were carefully 
dissected, the androecium consisted of from 48 to hi stamens, both limits, 
as those for the perianth, being multiples of three. The most frequent 
conditions as shown by the ‘curve’ (Fig. 3) were 72, 8i, and 87. The 
marked periodicity of the ‘curve’ is obviously related to a succession of 
trimeric modes. In no less than 55-3 per cent, of the flowers examined the 
staminal number was some multiple of three. 
Departure from the modes can here again be related to fission or fusion. 
Four flowers in which two anthers were present on a common filament 
exhibited a number of stamens which was a multiple of three (63, 63/75, and 
78) if the branching were ignored. 
The essential trimery of the gynaeceum was even more pronounced, 
since the number of carpels was a multiple of three in 57-3 per cent, of the 
flowers, the most common conditions being 60, 57, and 63 carpels respectively. 
