78 DENDROCHILUM, ETC. 



may be done a little every day, as the billets should 

 not be allowed to get dry while the plants are 

 growing, or else it will retard their growth very 

 much ; but, during their resting season, w^atering 

 once a w^eek will be sufficient for them, or a 

 slight syringing will answer the same purpose. 



The genera Denclrochilum, Dmema, and Trias 

 may be grown in pots, but wall require a good 

 drainage and a compost of turfy peat, and sphag- 

 num well chopped together and mixed with small 

 potsherds with a slight elevation above the rim 

 of the pot. Watering will only be required once 

 or twice a week at the farthest, for if they once 

 become thoroughly saturated with moisture their 

 roots turn black at the points and die. The tem- 

 perature while growing should range from 70" to 

 80° in the day, without the aid of sun heat ; but, 

 by night lowered 5° or 10"; during the season 

 of rest the temperature should again be lowered 

 "in the day to 60° or 70°, and by night to 50° or 60°. 



