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Principles of Plant Culture. 



plate, evaporation may be wholly prevented from cut 

 tings or plants, if desired. Propagating beds are often 

 covered with glazed sash, in addition to the glass roof 

 of the house, to assist in maintaining 

 a moist atmosphere about the cut- 

 tings (Fig. 96). 



For convenience, we 

 separate propagation by 

 cuttings into two divi- 

 sions, viz., propagation 

 by cuttings from dor- 

 mant and from active 

 plants. The require- 

 ments of these two 

 classes differ in some re- 

 spects. 



Pig. 96. Propagating bed covered 

 with glazed sash. 



a — Propagation by cuttings from dormant plants. 



370. The Time to Make the Cuttings. We have 

 seen that plant processes may not be wholly suspended 

 during the dormant period (176). This is true not only 

 of the plant as a whole, but also of detached parts of 

 the plant, if they are protected from evaporation. If 

 cuttings are taken from a plant in autumn and stored 

 during winter in a moist place of moderate temperature, 

 the cut surfaces will partially callus over (72), and the 

 formation of roots or buds may commence before 

 spring. 



When new growing points must be developed before 

 the cuttings can form a plant, as with cuttings of the 



