412 THE NURSERY-MANUAL 



Rochea. Crassulacece. 



Increased by cuttings taken in March, placed in sandy peat in 

 a night temperature of about 50. 



Rodgersia. Saxifragacece. 



Multiplied by division of the plant; also by seeds when obtainable. 

 Rodriguezia. Orchidacece. 



Increased by dividing the plant. See Orchids, page 372. 

 Rohdea. Liliacece. 



Propagated by division, and by seeds if they can be had. 

 Romneya. Papaveracece. 



Propagated by suckers ; also by seeds, but a long time is required. 

 Rondeletia. Rubiaceos. 



Propagated by cuttings of the young points of the shoots, placed 

 in sand in a warm house ; cuttings of half -ripened wood do well. 



Rosa (Rose). Rosaceoe. 



New varieties, and sometimes stocks, are grown from seeds, 

 which are sown as soon as ripe, or kept in the hips until spring. 

 The hardy kinds are usually sown in well-prepared beds outdoors. 



Roses are sometimes grown from layers, and often from root- 

 cuttings, after the manner of blackberries. 



The common way of propagating roses, however, is by means of 

 short cuttings of firm or nearly mature wood, handled under glass, 

 with a mild bottom heat (65 or 70). They are commonly made in 

 February or March from forced plants. The cuttings are made in 

 various fashions, some persons allowing most of the leaves to re- 

 main, and some preferring to cut most of them off, as in Fig. 123. 

 They are commonly cut to one-bud lengths, like Fig. 125. Long 

 cuttings of ripened wood, handled in a cool greenhouse or in frames, 

 may also be employed for the various perpetual and climbing roses. 

 For forcing under glass, cuttings of growing wood (either of the 

 "blind" wood or of the harder flower stems) are taken in late winter 

 or very early spring, struck in sand on benches, transferred to pots, 

 later planted on the benches and grown continuously in summer 

 and fall for the winter bloom. 



Most growers feel that the best plants are obtained from cuttings, 

 but most varieties do well when budded on congenial and strong 

 stocks. Budding by the common shield method is considerably 

 employed, and venejer-grafting is sometimes used (Fig. 128). The 



