REPORT OF THE CONFERENCE ON GENETICS. aie 
F,. Segregation into the expected types: 
Hooded, purple. 
Awned, purple. 
Hooded, white. 
Awned, white. 
H. Schimperianum x H. nutans. 
H. Schimperianum, lateral florets hermaphrodite, palexw black. 
H. nutans, laterals staminate, pales white. 
The black colour shows simple dominance. The F, has a few fertile 
laterals. In the F, there were forty-nine individuals with fertile laterals, 
forty-six with staminate laterals, whilst the remainder, ninety-nine in 
number, bore an occasional fertile lateral floret. Twelve sowings of this 
last type have all proved heterozygotes. 
H. decorticatum x H. densifurcatum. 
H. decorticatum, lateral florets radimentary with no sexual organs. 
Hi, densifurcatum, lateral florets hermaphrodite, palew hooded. 
F,. Lateral florets staminate, hoods more or less sessile. 
F,. Hermaphrodite : staminate : sexless laterals :: 1 : 2: 1. 
Hooded and awned types of all three in the proportion of 3: 1. 
H. spontaneum x H. hexastico-furcatum. 
In H. spontaneum. the rachis is brittle: laterals staminate, pale 
awned. I’, with staminate laterals, hooded palex, and a brittle rachis. 
In the F, tough and brittle rachises on six rowed or two rowed ears 
with awns or hoods. 
(The rachis is so brittle that only isolated spikelets could be shown.) 
SPECIMENS EXHIBITED BY Dr. JoHN H. Witson, St. Andrews 
University, Scotland. 
1, A series of mounted specimens of crossed wheats to show Mendelian 
segregation. The seed-parent was Red King (Garton’s) and the pollen- 
parent Rood Koren. The former is awnless, the latter awned. The 
specimens illustrated the established fact that the awned character is 
recessive. 
2. An ear of a new hybrid oat Goldfinder x Potato Oat, to show 
enhanced vigour characteristic of many hybrids. 
3. Pods of peas, viz. Gradus, Sugar Pea, and reciprocal hybrids of the 
first generation. The hybrid pods, still green, were dissected to demon- 
strate the fact that the inner membranous lining present in the pod of 
Gradus and absent in the Sugar Pea, was present in both hybrids. 
4. Digitalis lutea x D. purpurea, D. lutea x D. purpurea alba, and 
D. purpurea alba x D. lutea. These specimens showed that the hybrids 
having the white foxglove as a parent were more vigorous than those 
having the purple foxglove, and further that the reciprocal crosses 
between the white foxglove and D. lutea differed in respect of form and 
colour of the flower. 
