366 THE ORCHID REVIEW. 
pollen of Phragmipedium x Sedenii, and the pod, after passing through 
the usual stages of growth, ripened and opened naturally on 15th August 
(x50 days after pollination). A careful examination of the interior of 
the pod showed thousands of shrivelled ovules, among which, here and 
there, were 166 plump and well-developed seeds. These latter were a 
shiny dark brown colour, and under the microscope a small dark egg-shaped 
spot (embryo) was discerned in the middle of each seed, and grains of 
green coloured matter (chlorophyll) were distributed all over the interior of 
the seed. They were almost transparent, and were covered with a finely- 
netted skin. They varied considerably in shape, some being bent up at 
the ends, others quite straight, some keel-shaped, others serpentine in 
outline, but all agreeing in having swollen middles and attenuated ends. 
Everyone of the 166 seeds appeared to be healthy and fertile. 
On 16th April, 1897, Paphiopedium Exul was crossed with the pollen of 
Cypripedium Calceolus; the seed-pod duly matured and ripened on 18th 
November (216 days after pollination). An examination of the contents of 
the pod showed, like the last, a vast number of shrivelled ovules, but in 
this case there was a much larger proportion of plump, well-developed 
seeds, these numbering 597 all told. Viewed under the microscope these 
seeds appeared to be more or less egg-shaped, and being almost opaque 
were more difficult to examine than the last, being dull dark brown in 
colour, and covered with a coarsely netted skin, the surface of which was 
very uneven in colour. The whole of these seeds were plump, and as far 
as one could judge, perfectly healthy and good. 
On gth May, 1897, Cattleya Mossizee was crossed with the pollen of 
Angraecum sesquipedale. The pod gradually swelled until 18th June 
(40 days after pollination), when it measured 24 inches in girth. On this 
day it commenced to change colour, turning from deep green to pinky 
green, and then to pinky yellow, and on the 1st of July the pod was quite 
soft at the base, the upper part nearest the column being still more or less 
firm, but evidently in a state of decay. A vertical section of the pod and 
column showed that the pollen tubes had grown down the columnar canal 
to the length of 2} inches, and in a few cases had even entered the 
seed-chamber itself, though they did not appear to have come into contact 
with the ovules. These latter had developed slightly, but showed no signs 
of fertilisation. 
On the same day Angraecum sesquipedale was crossed with the pollen 
of Lelia purpurata. The pod swelled very rapidly until 28th July, when it 
reached its climax (80 days after pollination). It then measured 4} inches 
in girth and began to change colour, and two days afterwards it opened 
naturally. Inside the pod I could find no trace of a single seed, though it 
was full of chaff'and shrivelled ovules, together with a large number of 
1 yaad sill anapn P aea  rane eral 
