226 THE NURSERY LIST. 



Dianthera. As for Justicia. 



Dianthus. See Carnation, Pink and Sweet William. 



Dicentra, Dielytra (Bleeding Heart). Fumariace<z. 



The crowns may be divided in early spring, or cuttings 

 may be made of the fleshy roots in short lengths, and 

 placed in sand. The roots should be placed in a compost 

 of sandy loam, in well-drained pots, as soon as the foliage 

 dies off, and transferred to a coldframe. The native spe- 

 cies propagate readily by the underground parts D. Cu- 

 cullaria by division of the bulbs, and D. Canadensis by 

 the little tubers. All species grow from seeds which have 

 been stratified. 



Dichorisandra. Commelinacece. 



Propagated by seeds, divisions and cuttings. 

 Dicksonia. Filices. 



Division mostly. See Ferns. 

 Dictamnus (Dittany, or Fraxinella). Rutacece. 



Seeds should be sown as soon as ripe. Division. 

 Dictyosperma. See Areca. 

 Didymocarpus. Gesneracece. 



Cuttings, which are obtained from young shoots when 

 commencing growth, and placed in sandy soil, in heat. 

 Also by seeds. 



Dielytra. See Dicentra. 



Diervilla, Weigela. Caprifoliace<z. 



Suckers. Cuttings may be made in spring, summer or 

 autumn. Hardened green cuttings, handled under a 

 frame in summer, are extensively used by nurserymen. 

 (See pages 67, 68. ) They are sometimes grown from cut- 

 tings in winter from forced plants. Hard-wood cuttings, 

 made in winter and planted in spring, like the grape, suc- 

 ceed well. 



Dieffenbachia. As for Caladium. 

 Digitalis (Foxglove). Scrophulariacece : 



Seeds, sown in spring, either indoors or in the open. 

 The common foxglove (D. purpurea} often self-sows. 



Dill {Anethum graveolens}. Umbelliferce. 

 Seeds, in early spring. 



