and the Use of the Kinema tograph. 769 
begin to expand, but here only a few staminodes were 
protruded and erected from between the petals (Fig. 50). 
This happens so constantly when a flower is checked in 
opening (see Fig. 56) that it seems as if in some way the 
delicate projections from the filament must be more sensitive 
to temperature changes than the rest of the flower, and are 
perhaps able to send a message to the other parts. At 
12.40 p.m. the temperature again rose above 6o° F. (15*5° C.), 
and it put up a third sepal (Figs. 49 and 50) at 2.20 p.m. 
Another hailstorm so reduced the temperature that the flower 
closed for the night (Figs. 51 and 52). Figs. 53 and 54 show 
it open the next and following mornings. In Fig. 53 the style 
will be seen to be short, while in Fig. 54 (drawn the following 
day) it had grown to the length of the stamens. 
Another flower (Fig. 55), which began opening at 10 a.m., 
kept one sepal up (Figs. 55—57) till 12.30 p.m., and then 
a hailstorm lowered the temperature, and it closed for the 
night (Fig. 58). 
I watched one flower on Nov. 20, which had been trying to 
open for three days ; this had developed the most conspicuous 
joint, which I ever observed. 
On warm sunny days the buds go on. developing, and one 
sometimes has the good fortune to be able to watch the 
whole process of opening without getting up before sunrise. 
Figs. 22-25 show a flower, which began opening at 12 p.m. and 
was full open at 2.5 p.m., closed at 6 p.m. Note in Figs. 23 
and 24 the staminodes rising above the first opened petal. 
The so-called ‘ sleep * of these flowers is a very interesting 
and variable process, and probably has some connexion with 
their fertilization, as the flowers no longer close well after the 
stamens have ceased to be sensitive. The plant is very 
active at night. The buds move upwards and outwards in 
the most vigorous way all night, and the style also grows 
in length during the night, so that a one-day-old flower, 
which had a short style on closing about 6 p.m., has on 
opening the following morning a full-grown style as long as 
the stamens. 
