VARIETIES DESCRIBED. 67 



frost. This covering may continue till March, 

 and then must not be removed at once, but at 

 twice or thrice ; as want of caution in not remov- 

 ing their winter covering gradually is the death 

 of thousands of half-hardy plants. If a plant is 

 protected with spray or furze, remove half in mild 

 weather in March, and let the remainder continue 

 a week or fortnight longer, being regulated by 

 the weather. The treatment of the Grevillia rose 

 as a pillar may be applied to all the varieties of 

 Eosa multiflora, as they are impatient of cold. 

 Hybrida, or Laure Devoust, is a hybrid, and a 

 most elegant and beautiful rose, having all the 

 peculiar neatness of the double red and white va- 

 rieties, with large flowers and more beautiful foliage. 

 This is one of the prettiest climbing roses known. 

 A Genevese friend informs me that some pillars 

 of this rose at Geneva are thirty feet high, and 

 covered with flowers the greater part of sum- 

 mer. Rubra, or the Double Red, is our oldest 

 variety, but still interesting and pretty. Large 

 plants of this rose may sometimes be seen, seldom 

 putting forth flowers; this is owing to severe 

 pruning, or to the winter killing the small 

 spray-like shoots from which they are generally 

 produced. 



These roses have but few adaptations. I have 

 given under Grevillia Rose their culture as pillar 

 roses. For these and for warm situations against 

 walls they are very ornamental : they also bloom 



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