November 14, 1908. 
THE GARDENING WORLD. 
7 13 
= Rose = 
Blanche Double de Coubert. 
The hardy character of the Rose named 
Rosa rugosa and coming from Japan is 
.veil known to all Rose growers on a 
arge scale. Several of the hybrids are 
very continuous flowering and the variety 
above named is one of them. The Eng¬ 
lish rendering of the name would simply 
be Coubert's Double White Rose. The 
flowers are only semi-double, but they 
are of a large size, delightfully fragrant 
and produced in succession over the 
whole of the warmer period of summer. 
Our illustration shows a bed of this Rose 
which we had photographed at Kew 
during the first week of June last, but 
it might have been photographed at 
various periods for two months after¬ 
wards. 
The individual flowers are of fair dura¬ 
tion, but as they drop their petals, other 
branches are producing buds and flowers 
that form a succession. A bed like this 
makes its presence felt for long distances 
in the garden. The white colour, of 
course, would show up as far as the eye 
could see the colour, but anyone who 
happens to pass the bed on the lee side 
of it could not fail to detect the strong 
scent emanating from the flowers, even 
if he did not know from whence this 
scent was coming. Besides these quali 
ties, the varieties or hybrids of R. rugosa 
are wonderfully exempt from insect 
attack and fungi as well. We do not 
remember seeing the foliage destroyed by 
either of these enemies which attack 
numerous other Roses. 
It’ would be well, therefore, to encour¬ 
age the increase of fine varieties having 
Many growers will no doubt find the 
present season a trying one for the de¬ 
velopment of specimen blooms, the 
moist atmosphere accompanied by an ex¬ 
ceptionally high temperature for the. time 
of the year being, favourable to mildew, 
as well’as ■■rusting' 1 and "damping" of 
the florets. The mildew is best com¬ 
bated by means of a good fungicide dis¬ 
tributed in powder form by means of a 
bellows or rubber distributor. Some of 
the powder falling upon the hot water 
pipes will have a tendency to sweeten 
the atmosphere of the greenhouse. 
Rusting 15 and “ damping” of the florets 
cannot be entirely prevented where the 
K. rugosa for one of their parents, as 
their immunity from enemies of various 
kinds would save the rosarian a deal of 
trouble. At present the plants grown 
are rather tall, but for the pleasure 
grounds or shrubbery and for large beds 
they are certainly well deserving of more 
extended cultivation. 
plants have been grossly grown for the 
production of flowers of the largest size; 
but to arrest the progress of these troubles 
the pipes must be kept warm enough to 
dry the house, even when in doing so. 
the temperature is raised ten degrees 
above the normal, that is to say, when 
the weather out of doors is clear and cool 
the temperature of the greenhouse should 
range from 50 to 55 degrees, but if the 
outside' temperature should be 50 to 55 
degrees accompanied by fog and rain 
it will be necessary to raise the tempera¬ 
ture of the greenhouse to 60 or even 65 
degrees to maintain a dry atmosphere. 
Wherever “damping” is prevalent 
Chrysanthemums. 
RUSTING ” and “DAMPING. 
Rose Blanche Double de Coubert. 
Maclaren and Sen's. 
