ARTICHOKE ASCYRUM. I77 



a new stock should be started about every other year. 

 It is increased also by suckers or divisions of the stools. 



Artichoke, Jerusalem {Helianthus tuberosus). Composites. 

 Commonly increased by means of the tubers, which 

 may be planted whole or cut into eyes, after the manner 

 of potatoes. Seeds are very rarely used. 



Artocarpus (Bread Fruit). Urticacece. 



Propagation is difficult, as the plant is grown in north- 

 ern countries. Suckers may be utilized when procurable. 

 The young and slender lateral growths are used for cut- 

 tings. 



Arum. Aroidece. 



Propagated by seeds, but usually by division of the 

 roots, the best time being just as they begin their new 

 growth, securing as many roots as possible to each divi- 

 sion. Any rootless pieces should be placed in heat 

 shortly after removal ; this hastens the formation of roots 

 and excites top growth. Arisaemas are treated in the 

 same way. 



Arundinaria. Graminece. 



Increased by division of the root. 



Arundo (Reed). Graminea. 



Propagated by seeds or divisions, spring being the 

 best time for either method. In early autumn, the canes 

 can be cut into lengths of i8 to 24 inches for cuttings, 

 and partly buried in sand in a gentle bottom heat, lay- 

 ing them horizontally. 



Asarum. Aristolochiacea. 



Propagated easily by divisions in spring. 



Asclepias (Milkweed, Silk weed). Asclepiadaceee. 



Increased by seeds sown in pots in spring, pricked out 

 singly when large enough, and treated like cuttings. By 

 cuttings, which should be secured in spring, struck in 

 gentle heat, under a bell-glass, and as soon as they are 

 well-rooted potted into small pots. Seeds of A. tuberosa 

 must be sown or stratified as soon as gathered. 



Aseyrnm. Hypericacece . 



Increased by seeds and by careful divisions of the 

 roots in spring, 



