INFERTILE HYBRIDS. 209 
the base. On one of these stems, alive at the height of 2 ft. 4 in., the 
bud at the height of 1 ft. 4 in. pushed into leaf, two buds higher up being 
left exhausted. Another stem pushed a strong bud at 1 ft. up, and the 
third a strong bud at 1 ft.6in. The fourth stem pushed a bud at 13 ins., 
two buds beyond that dying. No suckers appear. The leaves show the 
blending of the parental characters. There are usually five leaflets, 
sometimes seven, with occasional development of the supplementary 
pinnules as in Ff. occidentalis. The serration is moderately deep, and the 
surface rugose, but less so than in Ff. rosefolius. Much red coloration is 
developed in the leaves. Prickles of an intermediate size occur on the 
rachis. 
Flowers (fig. 49) are produced, but very sparingly. They are about 
the same size as those of the seed-parent, but are of quite a different 
shape from those of either parent. Their colour is white. They are 
absolutely sterile. 
Rubus phenicolasius x R. Ideus var. 
The hybrid between the Japanese wineberry and the raspberry, and 
represented by only one plant, is a distinct one, showing many interesting 
intermediate characters. ‘The stems of the wineberry are green and clad 
with a dense coat of rose-coloured hairs, with sparsely distributed green 
prickles } in. long. In the raspberry the stems are coated with bloom, 
and are naked except for the presence of scattered minute dark prickles. 
In the hybrid the stems are. pale green, clothed with minute rose hairs, 
with scattered deep purple prickles } inch long. 
The flowers of the hybrid are small, and open at a date later than the 
raspberry, but earlier than the wineberry. 
This hybrid produced a few small fruits this season. It seems likely 
that when the plant is better established it will bear a fair crop. The 
date of ripening lies between the dates for the parents. 
The President said they ought to have more facts as to the sterility of 
hybrids, because as soon as sterility manifested itself they were at a loss. 
Professor Lotsy: We have been hybridising Carex at Leyden, and 
though we haye experimented with thousands we have never got a single 
seed. 
