CHAP. VII. 
DISENGAGEMENT OF CALOPvIC. 
335 
Names. 
Duration 
of the 
Experiment. 
Oxyg 
By the bud. 
en destroyed, 
By the 
flower dur- 
ing its ex- 
pansion. 
By the 
flower in 
withering. 
Passiflora serratifolia 
12 hours. 
6 times its vol. 
12 
7 
Hibiscus speciosus 
24 
6 
8-7 
7 
Cucurbita maxima, 
male flower 
24 
i7-4 
12 
10 
Arum italicum, 
spadix cold - 
24 
5 to 6 
spadix hot - 
- 
- 
30 
24 hours after 
- 
- 
" 
5 
It was also found that flowers in which the stamens, disk, 
pistil, and receptacle, only, were left, consumed more oxygen 
than those that had floral envelopes, as is shown by the fol- 
lowing table : — 
Duration 
Oxygen destroyed. 
Species. 
of the 
Experiment. 
By the flowers entire. 
By the usual organs 
only. 
Cheiranthus incanus 
24 hours. 
1 1 *5 times their vol. 
1 8 times their vol. 
Tropaeolum majus - 
Cucurbita maxima, 
24 
8-5 
16-3 
male 
10 
7-6 
16 
Hypericum calycinum 
24 
7-5 
8-5 
Hibiscus speciosus 
12 
5-4 
6-3 
Cobaea scandens 
24 
6-5 
7-5 
And it is here to be noticed, that those whose sexual ap- 
paratus destroyed the most oxygen have the greatest quantity 
of disk, and vice versa ; with the exception of Cobasa scandens, 
in which the disk is very firm and persistent, and probably, 
therefore, acts very slowly. 
When the cup-shaped disk of the male flowers of the 
Gourd was separated from the anthers, the latter only con- 
sumed 11*7 times their volume of oxygen, in the same space of 
time which was sufficient for the destruction of sixteen times 
their volume when the disk remained. The spathe of Arum 
maculatum consumed, in twenty-four hours, five times its 
volume of oxygen ; the termination of the spadix thirty times ; 
the sexual apparatus 132 times, in the same space of time. 
