75 
of their existence ; others, as the common broom rape, are ori- 
ginated in the soil, and afterwards, when they have attached 
themselves to their stock, the original roots die; other parasites, 
again, are originated on the stock, and in their more advanced 
state produce roots of their own. In some cases the nature of 
the connection between the parasite and the stock is such, “ as 
can only be explained on the supposition, that the germinating 
seed of the parasite excites a specific action in the stock, the re- 
sult of which is the formation of a structure, either wholly or in 
part derived from the root, and adapted to the support and pro- 
tection of the undeveloped parasite ; analogous, therefore, to the 
production of galls by the puncture of insects.” on this suppos- 
ition may be explained, the connection between the flower Rafile- 
sia and the root from whence it springs. 
118 Rhododendron, Grafting of. Mr. .Joseph Walker of Ban- 
ner Cross, near Sheffield, has succeeded in grafting the Rhodo- 
dendron Alta-clerense on the ponticum. In a communication 
inserted in the last (74th) Number of the Gardener’s Magazine, 
he states that having obtained a small sprig of the Rhododen- 
dron Alta-clerense from Mr. Paxton at Chatsworth, he inserted 
the end of it into a potatoe, and took it home. Happening, he 
says, to have a small jilant of Rhododendron ponticum in a pot, 
I cut it down to about five inches above the pot, and grafted it in 
the whip manner with the small sprig thus |)rocured, letting the 
end still remain inserted in the potatoe. I then clayed it, and 
put it under a hand glass in a cool vinery, where it united to 
the stock, and is now a healthy plant, standing out under a 
south wall. 
119 Preserving Plants during a Voyage. Capt. R. Gillies, 
of the ship Hibernia, communicated the following method to 
Messrs. Fox; given in the Report of the Royal Cornwall Poly- 
technic Society. “ In accordance with your wishes, I have 
much pleasure in describing to you the mode in which the 
plants brought by me from Calcutta were put up. The plants 
were all intended for the greenhouse in England, and, 1 presume, 
were of a delicate kind. Each plant was in a box, six inches 
square, by one foot in depth, filled to the top with a kind of 
clay ; and, no doubt, well saturated with water, previously to 
being put into the large outer box, which contained eight of 
these small ones. The large box was constructed in the usual 
188 AUCTARICM. H9» Gardener’s Mag. 12, 204. 
