446 
THE GARDENING WORLD 
March 10, 1900. 
some acres of Dahlias, which we have examined on 
more than one occasion, so that they are in a position 
to test all the best of the new varieties as they are 
sent out. Keynes’ White flowers profusely, the 
blooms being carried on long stalks, so that they are 
fit either for home decoration or the exhibition 
board. 
-•»»- 
READ THIS. 
The prize last week was awarded to Mr. S. Jordan, 
Danesbury Gardens, Welwyn, Herts., for his article 
on 'Coelogyne cristata.” 
Questions add gasmens. 
Scale on Pot Peach Trees.— J. Macdonald : The 
scales you sent us are those of the Vine Scale 
(Pulvinaria Vitis). In all probability they have got 
on the Peach trees accidentally, for they seem in no 
way particular as to what they cling, having become 
fixed to the paper in which they were wrapped as if 
they had grown there. On the Continent they live 
upon Vines in the open air. In this country they 
seldom get the chance to do so, but in vineries they 
become a terrible pest where they succeed in es¬ 
tablishing themselves. They are in the breeding 
stage, as you say, for there appears to be thousands 
of pale red eggs lying amongst the woolly matter, 
and ready to hatch out immediately the temperature 
rises, whether by artificial means or by the aid of 
sunheat in spring. You cannot, therefore, begin too 
soon to clear them out. You may collect the scales 
into a close tray or something that will hold them, 
and take the first opportunity you have for burning 
them. The infested plants should be washed with 
strong soapy water, or a solution of Gishurst Com¬ 
pound. Examine all the trees and Vines you have 
in the houses, and see that the pest is thoroughly 
destroyed. You must bear in mind that, if the old 
scales and their thousands of eggs are destroyed 
before the latter hatch out, you will be saved a great 
deal of trouble later on, after the multitudes of eggs 
have given place to a similar number of young, 
which are active, and roam all over the plants in 
search of a snitable place to settle down. 
Species of Scrophularia, &c.— E.C.H.D. : In the 
Index Kewensis 160 species of Scrophularia are re¬ 
corded. Only a few of these are in cultivation in 
botanic gardens chiefly. Species occasionally culti¬ 
vated are S. chrysantha, S. sublyrata, S. vernalis, 
S. sambucifolia, S. alata, S. nodosa and S. aquatica. 
The only species we have seen in private gardens, 
except as weeds, is S. aquatica variegata, often, but 
erroneously, named S. nodosa variegata. It is grown 
as a variegated plant in bedding designs to supply a 
bit of colour, the flowering stems being carefully cut 
away. S. Scorodonia is said to occur in the extreme 
south-west of England, and that, we take it, would 
include Cornwall. S. vernalis might also occur 
there, but it is very irregular in its appearance. The 
Heliotrope, that is, the common one is Heliotropium 
peruvianum. 
Names of Plants.— H. J. Read : i, Carexbrunnea 
variegata; 2, Carex Morovii variegata; 3, Azalea 
amoena ; 4, Coleonema album ; 5, Daphne indica; 6, 
Polypodium aureum.— E. C. H. D. : 1, Euphorbia 
amygdaloides; 2, Euphorbia portlandica.— E. C. 
H. D.: 1, Ranunculus Flammula; 2, Ranunculus 
hederaceus ; 3, Potamogeton natans (will be in better 
form in June and July); 4, Callitriche verna; 5, 
Arabis albida (a garden flower or escape) ; 6, Tussi- 
lago Farfara. 
Communications Received.—D. McGregor.— 
Oxygen.—C. Macquarie.—D. D.—J. Mayne.— 
Allister Dhu.—London Scottish.—A. Hope.—H.— 
G. M.—W. M. W.—T. B —J. Macl. 
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