THE NURSERY-LIST 339 



lochroma. Solanacece. 



Seeds and cuttings as for cestrum. 



Ipomoea (Moonflower. Morning-Glory ) . Convolvulacece. 



All the annual species (or those grown as annuals) are raised 

 from seeds. Seeds of moonflowers and similar species should 

 usually be filed or cut on the point, and started in a rather high 

 temperature. The perennials are also increased by seedage, but 

 they may be raised from cuttings struck in a forcing-house or a 

 frame. The moonflowers often do better in the North from cuttings 

 than from seeds ; this is true also of some of the greenhouse species 

 that do not produce seeds. Some kinds root with difficulty from 

 cuttings, however, and they may be propagated by grafting cions 

 of well-ripened wood of roots on 7. pandurata or other species. 

 Division is sometimes employed. 7. pandurata can be propagated 

 by root-cuttings; also grafted. See Calonyction, Quamoclit, 

 Sweet Potato. 



Iresine, Achyranthes. Amaranthacece. 



Increased readily by cuttings. For summer bedding in the 

 North, cuttings should be started in February or March ; for use 

 as window plants, they should be taken in late summer. Old 

 plants may be carried over winter to provide a supply of cuttings, 

 or plants may be grown for this purpose from cuttings struck in 

 late summer. Rarely propagated by seeds. 



Iridaceee. Irids. 



The rhizomatous irids are easily increased by offsets or division. 

 The species and varieties of crocus and gladiolus are readily prop- 

 agated by offsets. The species of irids produce seed freely and 

 are rapidly increased from these. These seeds should be sown as 

 soon as ripe ; if carried over until spring the germination is much 

 slower. 



Iris. Iridaceee. 



Seeds grow readily and give good results, and are usually pro- 

 duced 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. See Iridacece. 



