THE NURSERY-LIST 243 



to give more variable results and to be unsatisfactory unless very 

 carefully selected ; if seeds are started early, edible heads may be 

 had the same year, but usually not till the second year. For 

 divisions, the buds or shoots are detached from the old crown in 

 spring before growth begins. 



Artichoke, Jerusalem (Helianthus tuberosus). Composites. 



Commonly multiplied by means of the tubers, which may be 

 planted whole or cut into eyes, after the manner of potatoes. 

 Seeds are very rarely used. The plant is hardy and persistent, 

 and propagates itself strongly. 



Artocarpus (Bread-Fruit). Moracece. 



Grown from cuttings of the young lateral growth ; also from 

 suckers, when they form ; by seeds, when procurable. 



Arum. AracecB. 



Several very unlike plants bear the name arum in cultivation, as 

 dracunculus, helicodiceros, amorphophallus ; propagation is 

 similar for all of them. Most of them produce offsets from the 

 tubers or rhizomes. The seeds or berries may be planted when ripe 

 or stratified until spring. See Araceae, page 239. 



Arundinaria (Wild Cane. Bamboo). Gramineas. 

 Multiplied by division. See Bambusa. 



Arundo (Reed). Gramineoe. 



Multiplied by division. In early autumn, the canes can be cut 

 into lengths of 18 to 24 inches for cuttings, and partly buried in 

 sand in a gentle bottom heat, laying them horizontally. It seldom 

 seeds, at least in the North. 



Asclepias (Milkweed. Silkweed). Asclepiadaceoe. 



The glasshouse kinds are increased by cuttings in spring in 

 gentle heat, under glass. Seeds of A. tuberosa must be sown or 

 stratified as soon as gathered. Seeds of most native kinds are pro- 

 duced freely, and should give strong flowering plants the second or 

 third year. Some kinds may be multiplied by division. 



Asimina (Papaw; see Papaya). Annonacece. 



Propagated by seeds sown in autumn, or stratified and sown in 

 spring ; do not let the seeds dry out. The seedlings may be raised 

 in pots. Also increased by layers made in autumn, and by root- 

 cuttings. 



