200 THE METROPOLITAN FLORAL EXHIBITIONS. 



and many of their plants. It may, perhaps, not he quite out of place 

 here to observe, that such seedlings or cuttings as have originated in 

 the fine white sand of cultivators, should have their roots completely 

 cleared of it before they are potted in their natural mould ; for 

 although most plants emit roots in that sand, it becomes injurious to 

 many of them after they quit their cutting or seed state. 



AVe may here however remark, that this family are less annoyed by 

 insects than most other exotic plants, still they are not entirely 

 exempt ; for that destroying insect, the green fly of gardeners, some- 

 times attacks the heath, and as it is found impatient of the usual 

 remedv, tobacco smoke, the best cultivators dip the plant, or parts in- 

 fected, in a decoction of tobacco liquor. Mildew sometimes attacks 

 the heath ; but this, like the cause of its appearance in all other cases, 

 must be owing to damp or stagnation of air. To remedy this evil, 

 has not always been found an easy task ; indeed, we recollect, about 

 two years ago, to have seen nearly the whole collection of this family 

 in the nursery of a cultivator, who is allowed to be one of the best in 

 the neighbourhood of London, nearly destroyed by it. Free ventilation 

 and a dry atmosphere seem the basis of a certain cure, and the appli- 

 cation of flour of sulphur dusted on the plants, or put on them in form 

 of paste, may be considered as effectual in removing the evil. 



( To be continued.) 



ARTICLE IV. 



THE METROPOLITAN FLORAL EXHIBITIONS. 

 Royal Botanic Society, May 20. 



At this, the first exhibition for the season, the magnificent display 



of plants and numerous attendance of visitors, amply testified that 



their already great popularity is increasing; and we only regret 



limited space, as usual, prevents so full a report being given as we 



could wish. 



1. — Stove and Greenhouse Plants. 



In collections of 30. — In this class two collections were shown, one by Messrs. 

 Emzer, of Leabridge, and the other by Mr. Barnes, gardener to G. W. Norman, 

 Esq., of Bromley. The group from the former comprised the most magnificent 

 specimens of first-rate cultivation. We will name particularly Boronia serrulata, 

 a splendid bush, 3 feet by 4; Eutaxia pmigens, about the same size; a well- 

 grown Bossisa disticha plumosa, producing multitudes of dull yellow and brown 



