Xiaa 8, 1M3. 
THE GARDENERS' MAGAZINE. 
165 
form a new root system when 
- jr* maltreated in plantmg, giist as 
■ t ti«»« do* It would be interesting to 
■ ;f Mr. Pickering can give any ex- 
‘■!ta of this. _ 
' Torquay Sweet Pea Society 
. addition to the list of societies 
. . devoted to the cult of the sweet 
The first exhibition under the aus- 
J society will be held on June 25, 
) !be«hedule of prizes includes thirty- 
MitTEthel Sargent, F.L.S., who 
' 3 done excellent work in connection with 
Joseph Hooker, about forty years ago, they 
have been grown on a curving line of iron 
osts near the North Gallery, where they 
ave had to be treated as bush rather 
than climbers; being pruned back every 
winter and the shoots being shortened once 
or twice during the summer. A pergola of 
the same type as the Rose Pergola has now 
been provided for them. It consists o^' two 
rows of iron uprights connected by flattish 
arching rods and linked together lengthwise 
by chains. The perloga is about 500 feet 
long, 11 feet wide, 10 feet high, and about 
12 feet between each pair of uprights. It 
nascent sulphur produced under the elec¬ 
trical influence immediately destroys the 
red form of gooseberry mildew. More ex¬ 
tensive tests are to be carried out next 
autumn, together with experiments in 
which other bushes will be sprayed with 
sulphur-bacterial solutions. 
Floral Zygomorphy. — To the 
monthly meeting of the Royal Society of 
Edinburgh Mr. J. McLean Thompson con¬ 
tributed a paper on the initiation of sta- 
minal zygomorphy. In the course thereof 
he directed attention to the fact that a 
study of the very young buds and expanded 
-a growing plant with flowers of a r. 
is to 
of the RrV Section at t 
Association, whii 
= ,'^^over ^ toe fij^t la< 
o* the British A 
The need f 
Wei^r^ingtothe o^ genera) at K« 
of the ®7er since tJ 
Arboretum bj S 
pu^l 
MAZUS RUGOSUS. 
de colour. A.M., R.H.S., and Hardy Plant Society, March 4. The Warffrave Plant 
n. The Arcade. Liverpool Street, E.C. 
runs parallel with the Acacia Avenue, be¬ 
tween it and the site of the Refreshment 
Pavilion. 
A New Remedy for American 
Gooseberry Mildew. Mr. T. 
Thorne Baker is, we learn, testing the 
effects of certain of the sulphur bacteria 
upon the American gooseberry mildew. This 
destructive fungus has been killed by Mr. 
Baker by applying to it, on the infected 
twigs, a sulphide solution, which is after¬ 
wards decomposed by the application of a 
high frequency electric discharge. 'The 
flowers of Greyia Sutherlandi showed that 
in all parts of the flower zygomorphy was 
initiate, but it was not maintained. In 
the case of the stamens the filaments did 
not attain the maximum length simul¬ 
taneously; but sooner or later they all 
attained the maximum length, and when 
this stage was reached the anthers dehisced. 
It was shown that the lengthening of the 
filaments was due to the elongation of the 
cells, the number of which remained the 
same from an early development stage up 
to the perfected condition. 
