506 



THE GARDENER'S ASSISTANT. 



Fig. 616. 



remains is to tie securely, pot up the stock, 

 and place it in a bottom heat of 65° to 75°. 

 Gradually admit light and air as the young 

 plants progress, 

 potting them on 

 into a good com- 

 post. The second 

 method of graft- 

 ing (fig. 617) is 

 employed when 

 the wood of the 

 stock is full of sap, 

 and also for green 

 or growing wood 

 of delicate varie- 

 ties. In either 

 method the sap 

 should be active. 

 Prepare the scion 

 as in fig. a, 

 not making one 

 straight cut, as in 

 the first method, 

 but cutting the 

 scion so as to 

 form a seat or rest (see fig. b). This is to rest 

 upon the top of the stock (c) when cut off as 

 near to the root as possible, and so as to allow 

 of the scion being 

 inserted beneath the 

 raised bark (d\ which 

 should be lifted in the 

 same manner as in 

 budding. Slip the 

 scion beneath the 

 bark, and press it 

 down until the seat 

 (b) rests upon the top 

 of the stock, and the 

 whole resembles e. Tie 

 securely, and treat as 

 in the first method 

 described. It often 

 occurs that suckers 

 form upon the roots 

 of stocks while under 

 the influence of heat. 

 These must be removed as soon as noticed. 



Classification. — Botanists divide the genus 

 Rosa into eleven groups, each typified by a 

 species, i.e. Banksiance, Bradeatce, Canince, &c. 

 These are again subdivided into about 130 

 species, and first hybrids. In gardens, how- 

 ever, this classification is unworkable, so many 

 of the species and hybrids having been crossed 

 and recrossed. It has therefore become neces- 



Fig 617. 



/ 



Ki\ 



sary to group Garden Roses according to their 

 habit, time of flowering, fragrance, &c, under 

 such names as Hybrid Perpetual, Monthly, 

 Tea -scented, Moss, &c. Generally, however, 

 there is a botanical relationship among the 

 members of each group, so that an acquaint- 

 ance with the main features of the groups 

 renders their classification easy, even when the 

 plants are not in flower. These distinctive 

 characters are, however, likely to disappear 

 owing to the intercrossing of the groups, and 

 we have already what are called Hybrid-Teas, 

 Polyantha x Hybrid -Perpetual, Rugosa x Teas, 

 &c, names which indicate the nature of the 

 crosses. 



There are evidences of an increased interest 

 in what are termed botanical Roses, even the 

 species finding favour as decorative garden- 

 plants. The most noteworthy of these are 

 mentioned in the chapter on "Hardy Trees 

 and Shrubs ". Some of them are also included 

 in the following classified list. Most of those 

 described here are, however, either hybrids or 

 well-marked varieties. 



SUMMER ROSES. 



Provence Roses. — The individuals composing this 

 group owe their origin to Rosa centifolia (fig. 618), a 



Fig. 618.— Rosa centifolia. 



native of the Caucasus. The old Provence or Cabbage 

 Rose was well known in this country previous to 1596. 

 The flowers are generally of a globular shape, and being 



