302 THE NURSERY-MANUAL 



Dillenia. DilleniacecB. 



Increased by seeds; with some difficulty by cuttings of half- 

 ripened wood in sand in bottom heat. 



Dimorphotheca (Cape Marigold). Composites. 



The annuals are grown from seeds started indoors or planted in 

 the open. These plants have lately become popular. The 

 perennials are raised from seeds, also by soft cuttings, and perhaps 

 by division. 



Dionaea. Droseracece. 



Propagated by seed placed under a bell-jar on moist sandy soil 

 mixed with finely chopped sphagnum moss ; also by dividing the 

 plants. 



Dioon. Cycadacece. 



Increased by seed. See Cycas. 



Dioscorea (Yam). Dioscoreacece. 



The dormant tubers may be divided in autumn or spring; 

 start in heat. Seeds are sometimes used ; so are the tubers that 

 form in the axils by the leaves. Hothouse species can be prop- 

 agated by cuttings of the half-ripened wood. 



Diosma. Rutaceos. 



Propagated by cuttings of young wood, much as for the heaths. 



Diospyros (Persimmon. Kaki) : Persimmon. 



Dipladenia. Apocynaceoe. 



In spring, or as early as February 1, when the plants begin growth, 

 cuttings are made from the young shoots, placed in bottom heat. 

 The pots should be placed in a tight propagating-bed, in a night 

 temperature of 70. Propagated also by seed when obtainable. 



Diplazium. Polypodiacece. 



Propagation by spores and division. See Ferns, page 312. 



Diplothemium. Palmaceoe. 



Increased by seeds. See Palms, page 377. 



Dizygotheca. Araliaceoe. 



To this name are now referred some of the tender plants formerly 

 included in Aralia. Others are now included in Polyscias, which 

 see for propagation. 



