208 THE NURSER Y-BO OK. 



Iris, including Xiphion. Iridece. 



Seeds grow readily and give good results, and they are 

 usually produced freely, especially in the bulbous species. 

 Sow as soon as ripe in light soil in some protected place. 

 The bulbous species produce bulbels, which may be used for 

 multiplication. The rhizomatous species are propagated by 

 dividing the rhizome into short rooted pieces. Or when the 

 rhizomes lie on the surface of the ground and do not root 

 readily, they may be layered. 



Isonandra (Gutta-Percha Tree). Sapotacece. 



Insert cuttings in sandy soil, under glass, in heat. 

 Isoplexis, Callianassa. Scrophularinece. 



Cuttings of half-ripened shoots should be made in spring 

 under glass. 



Isopyrum. Ranunculacece. 



Propagated by seeds or by divisions, in autumn or spring 

 Itea. Saxifragece. 



Propagated by seeds or by suckers, in spring ; and in 

 autumn by layers. 



Ivy. See Hedera and Ampelopsis. 

 Ixia, including Morphixia. Iridece. 



Seeds may be sown in pans of sandy soil in autumn, and 



placed in a cool frame. Propagation by bulbels is a much 



quicker, as it is the usual method, 



Ixiolirion, Kolpakowskia. Amaryllidece. 



Increased by seeds ; and by bulbels. 

 Ixora. Rubiacece. 



Seeds. Usually increased by short-jointed green cuttings 

 placed in a close frame with a strong bottom heat. 



Jaborosa. Solanacece. 



Increased by seeds sown in spring, and by divisions, also 

 by cuttings of young shoots, placed under a frame. 



Jacaranda. Bignoniacece. 



Cuttings of half-ripened shoots may be made in early sum- 

 mer and placed in sand over sandy peat, in heat, and kept 

 shaded. Also seeds. 



Jacobsean Lily. See Amaryllis. 

 Jacobinia. See Justici_. 



