200 THE NURSERY-BOOK. 



Haemodorum (Australian Bloodroot). Hcemodoracece. 



Increased by dividing the roots in spring. 

 Hakea, Conchium. Proteacece. 



Well-ripened cuttings, placed in sandy peat under glass, in 

 a cool house. Seeds, when obtainable, can be used. 



Halesia, Pterostyrax (Silver-bell or Snowdrop Tree). Styra- 

 cacece. , 



Seeds, which rarely germinate till the second year. They 

 should be kept constantly moist. Propagation is also effect- 

 ed by layers, or by cuttings of the roots in spring and autumn. 

 Layers are commonly employed in this country. 



Halimodendron (Salt-tree). Leguminosa. 



Freely increased by seeds, layers or cuttings. May also 

 be grafted on common laburnum. 



Hamamelis (Witch-hazel). Hamamelidece. 



All grow from seeds or layers, and the Japan species suc- 

 ceed if grafted on American species in the greenhouse. H. 

 Virginica may be readily propagated by layers. 



Hamelia. Rubiacece. 



Seeds. Cuttings which are nearly ripe will root during 

 the early part of summer under glass, with heat. 



Hamiltonia, Spermadictyon. Rubiacece. 



Seeds. Half-ripened cuttings, placed in sand under glass. 

 Hardenbergia. Leguminosce. 



Seeds may be used ; also increased by divisions. Cuttings, 

 made of the firm young side shoots in spring, will grow if in- 

 serted under a bell-glass, and placed in a warm frame or pit, 

 without bottom heat. 



Hardwickia. Leg^^minosce. 



Propagated by ripened cuttings in sand, in a strong heat. 

 Harebell. See Campanula. 

 Hatchet Cactus. See Pelecyphora. 

 Haw, Hawthorn. See Crataegus. 

 Hazel. See Corylus 

 Heartsease. See Viola. 

 Heath. See Erica. 

 Heather. See Calluna 



