62 
Edith R. Saunders. 
It was noticed that in many of the white plants with yellowish- 
green spots, the spots turned brown sooner or later, but the moment 
at which the colour change occurs, varied considerably. In some 
cases it occurred in the fully open but still unfaded flower, in others 
not until after the corolla had begun to fade, in others again while 
the corolla was still closed; in the latter case, however, the original 
yellowish-green could be seen in the younger buds. 
(3) . White-flowered plants with yellowish-green spots breed 
true, and even when faded show no sign of ground colour. 
(4) . White-flowered plants with red spots may either breed 
true or give a mixture of whites with red spots (dominants) and 
whites with greenish-yellow spots (recessives). The flowers 
frequently become tinged as they get older. 
(5) . In coloured plants the spots are always red. 
Among plants of this class almost every shade could be found 
between deep purplish red and white with a faint flush. 
Summary. 
1. The characteristic features of D. purpurea heptandra, viz., 
dialysis and staminody of the corolla appear to be transmitted by 
heptandrous plants to all their offspring. 
2. The degree in which these peculiarities are exhibited varies 
not only among the individuals of a pure-bred family, but also 
among the flowers of one individual. 
3. This variation in the case of the individual has the 
appearance of being due to a wave of reversion which advances 
steadily up to a point and then declines somewhat towards the close 
of the flowering period. Where the evenness of this wave-like 
advance is broken, as sometimes happens, it is probably due to an 
alteration in the condition of vigour at the level of the break. Such 
an alteration may well occur at the level of transition from a non- 
fasciated to a fasciated condition, or again, there may well be a 
difference in vigour between the upper region of a main axis and 
the simultaneously flowering base of a lateral branch. 
4. The range of variation includes every grade from flowers 
with andrcecium and corolla normal, except for a lateral notch or 
cleft in the latter structure, to flowers apparently destitute of a 
corolla, and with nine or ten functional stamens united at the base, 
so that they form a single structure which falls as a whole. 
5. Heptandrous individuals showing at first the extreme 
heptandrous condition ( i.e ., no apparent corolla) may exhibit this 
