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412 THE NURSERY-MANUALRochea. Crassulaccc.Increased by cuttings taken in March,a night temperature of about. +50°.Rodgersia.Multipliedplaced in sandy peat inSaaij’ragnceoe.by division of t.he plant; also by seeds when obtainable,Rodriguezia. Owh i~!awcr.Increased by dividing the plant. See Orchi&, page 372.Rohdea. Lilintlct~.Propagated by division, and by seeds if they can be had.Romneya. Paparcractv.Propagated by suckers ; also by seeds, but a long time is required.Rondeletia. l?ubimv.Propagated by cuttings of the young points of the shoots, placedin sand in a warm house ; cuttings of half-ripened wood do well.Rosa (Hose). Rosncfp.Xew varieties, and sometimes stocks, are grown from seeds,which are sown a~ soon as ripe, or kept in the hips until spring.The hard)- kinds XC usuall>- sown iii 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 ofshort cuttings of firm or nearly mature wood, handled under glass,with a mild bottom heat (EC or 70” j. They are commonly made inFebruary or March from forced plants. The cuttings are made invarious fashions, some persons allowing most of the leaves to remain,and some preferring to cut most of them off, as in Fig. 123.They are commonly cut to one-bud lengths, like Fig. 125. Longcuttings of ripened wood, handled in a cool greenhouse or in frames,may also be emplo~~ed 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 winteror very earl>- spring, struck in sand on benches, transferred to pots,later planted on the benches and grown continuously in summerand 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 strongstocks. Budding by the common shield method is considerablyemployed, and veneer-grafting is sometimes used (Fig. 128). The