250 THE NURSERY LIST. 



Hakea. Proteacece. 



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

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



Halesia (Silver-bell, or Snowdrop Tree). Styracacece. 



Seeds, which rarely germinate till the second year. 

 They should be stratified or kept constantly moist. 'Pro- 

 pagation is also effected by layers, or by cuttings of the 

 roots in spring and autumn. Layers are commonly em- 

 ployed in this country. 



Halimodendron (Salt-tree). Leguminoste. 



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 

 succeed if grafted on American species in the greenhouse. 

 H. Virginica may be readily propagated by layers. 



Hamelia. Rubiacecz. 



Seeds. Cuttings which are nearly ripe will root during 

 the early part of summer under glass, with heat. 



Hamiltonia. Rubiacea. 



Seeds. Half-ripened cuttings, placed in sand under 

 glass. 



Hardenbergia. Leguminostc. 



Seeds may be used ; also increased by division. Cut- 

 tings, made of the firm young side shoots in spring, will 

 grow if inserted under a bell-glass, and placed in a warm 

 frame or pit, without bottom heat. 



Harebell. See Campanula. 

 Harpalium. See Helianthus. 

 Haw, Hawthorn. See Crataegus. 

 Hazel. See Corylus. 

 Heartsease. See Viola. 

 Heath. See Erica. 

 Heather. See Calluna ; also Erica 

 Hedera(Ivy). Araliacetf. 



Seeds. Layers. The rooted portions of the vine may 

 be severed and treated as independent plants. Cuttings 



