colour, though they contained the plumu 
‘plants. The blue colour recorded in the othe 
Sept.-Oct., 1919.] THE ORCHID REVIEW. 135 
female parent, were of a yellowish white, like the male. Towards the end 
of the summer I was equally surprised to find that these white seeds had 
produced some pods with all blue, some with all white, and many with both 
blue and white peas in the same pod. Last spring, I separated all the blue - 
peas from the white, and sowed each colour in separate rows; and I now 
find that the blue produce only blue, while the white seeds yield some pods 
with all white, and some with both blue and white peas intermixed.” Here 
then is Mendel’s ‘‘ dominance.” 
The Secretary added a note, that previous to the receipt of the above 
communication, one on the same subject was transmitted by Alexander 
Seton, Esq., and read at the meeting of August 20th. Mr. Seton impregnated 
the flowers of a well-known green pea, Dwarf Imperial, with the pollen of 
a white, free-growing variety. One flower produced a pod of four peas, 
which did not differ in appearance from the others of the female parent. 
The plants which grew from the four peas seemed to partake of the nature 
of both plants, being intermediate in stature, but when the pods ripened it 
was found that ‘‘ almost every one of them had some peas of the full green 
colour of the Dwarf Imperial, and others of the whitish colour of that with 
which it had been impregnated, mixed indiscriminately, and in undefined 
numbers; they were all completely either of one colour or the other, none of 
them having an intermediate tint, as Mr. Seton had expected. The 
representation of one of the pods in plate 9, fig. 1, conveys a very perfect 
idea of its appearance.” The paper appears in Trans. Hort. Soc. Lond., v. 
Pp. 234-237, and here we find Mendel’s “ dominance” illustrated in colour. 
The third experiment was recorded at pp. 377-380 by the well-known 
horticulturist, Thomas Andrew Knight. Mr. Goss had suggested the 
influence of the foreign pollen as the cause of change of colour in the seeds, 
but this Mr. Knight was able to explain from his own earlier experiments. 
When the pollen of a gray pea was introduced into the prepared blossoms 
ofa white variety, no change in form, colour, or size of the seeds took 
place ; all were externally like those of the white seed parent. But when 
sown, they uniformly gave plants with coloured leaves and stems, and purple 
flowers, these being followed by gray peas only. When the seedlings from 
these were again fertilised with pollen of a white variety, of permanent 
habit, the seeds produced were again uniformly gray, but many of these 
afforded plants with perfectly green leaves and white flowers, succeeded by 
white seed. The cotyledons of all the varieties employed or produced were 
yellow, consequently peas with white seed-coats retained their ordinary 
les and cotyledons of coloured 
r experiments was due to the 
