466 REPORT OF THE CONFERENCE ON GENETICS. 
round, when the leaf is crenate, or they are entirely wanting when the 
leaf is rugose and deeply, often doubly, serrated. 
Leaves with round or kidney glands are more susceptible to the attacks 
of the blister fungus, those with no glands to the mildew. Eighty crosses 
give the following results : 
1. Kidney x Kidney = 9 kidney, 0 round, 1 none. 
2. Kidney > oundy—=" 95 1, Aerts SORES 
3. Round So hound <4 1. OAR, thee 
4. Round{x Kidney 1h) 120 Ga 
5. Round None! ==> 0s ,, pagina! Sa 
6. None x Kidney = 0 &; ae ee ere 
i. None,  <-Round- = 10. ";, Oe Aen 
No. 1.—The seedling without glands is from a cross in which the 
pollen-parent’s female ancestors both have kidney glands; the seed- 
parent’s mother has no glands. A second seedling of this cross has 
kidney glands. 
Nos. 8 and 4.—Out of forty-six seedlings ten have no glands. In 
one case only, where the pollen-parent’s mother had serrate leaves, do 
non-glandular leaves occur in the female ancestry of either parent. In 
this cross, R x K, the six resulting seedlings are: 8K, 2R, 1N; the 
three female progenitors of the seed-parent have round glands. 
No. 5.—All six seedlings are the result of the same cross; the pollen- 
parent’s mother has round glands, as have the seed-parent’s two female 
progenitors. 
No. 6.—The three seedlings from the same cross; the seed-parent’s 
mother has round glands. 
No. 7.—Both seedlings from the same cross; the seed-parent’s 
mother has round glands; the pollen-parent’s parents both kidney 
elands. 
Seedlings seem to ripen approximately at the same time as one or 
other of their parents. They frequently appear to derive some characters 
from the one and some from the other parent indifferently ; sometimes 
they follow one or the other alone. 
A good illustration of this is the offspring of a very distinct nectarine, 
itself a chance seedling. This nectarine tree is peculiar in being devoid 
of colour. The flowers are small and white, the shoots pale green, 
elands kidney-shaped, and fruit with pale flesh and a white skin, ripening 
midseason. 
This nectarine crossed with ‘Noblesse’ peach ¢ gave a midseason 
nectarine with a crimson cheek and flesh red at the stone, small pink 
flowers, and kidney glands. ‘ Noblesse’ has large flowers and no glands, 
the fruit is without colour, flesh white to the stone. Here the colour in 
the seedling must have come from some ancestor. 
Crossed with ‘Harly Rivers’ nectarine ¢, which has large flowers, 
we have two seedlings, both nectarines; one with small pink flowers and 
a coloured fruit ripening early, following the pollen-parent ; the other, 
midseason, with pure white clingstone fruit, having small white flowers. 
Two parallel seedlings resulted from another cross with a different 
nectarine as pollen-parent. 
