242 THE NURSERY-MANUAL 



Arisaema (Indian Turnip). Aracece. 



Propagated by seeds and division as for arum. See Aracecc, 

 page 239. 



Aristolochia (Birthwort). Aristolochiacece. 



Propagated by seeds and layers. The seeds must be fresh. 

 Cuttings of tender sorts root freely in sand, with bottom heat. 

 A. elegans, frequently seen under glass, grows readily from seeds 

 which may be had of dealers. The dutchman's pipe (A. macro- 

 phylla, often known as A. Sipho) fruits freely when old and the 

 seeds are used to propagate it. 



Armeria (Thrift. Sea Pink). Plumb aginaceoe. 



Increased by division, separate pieces being planted as cuttings 

 out-of-doors. Seeds are sometimes used, when obtainable. 



Arnebia. Boraginacece. 



Propagated by seeds. Cuttings of the strong shoots, taken with 

 a heel, root slowly. Root-cuttings may be used for some kinds. 



Arnica. Composites. 



Multiplied by seeds sown in a frame in spring ; also by division 

 in spring. 



Aronia (Chokeberry). Rosacece. 



Propagated by seeds sown in fall or stratified ; also by suckers 

 and layers, or by greenwood cuttings under glass. By many 

 botanists retained in the genus Pyrus. 



Artabotrys. Annonacece. 



Propagated mostly by seeds ; and in the North by cuttings of 

 ripened wood in spring in sand under a frame, with bottom heat. 

 Treatment similar to annona, which see. 



Artemisia (Mugwort. Southernwood. Wormwood). Composites. 



The annuals are propagated by seeds, and also the perennials 

 of such kinds as produce seeds. The perennial kinds are commonly 

 increased by dividing the clumps. 



Artichoke (Cynara Scolymus). Composites. 



Grown from seeds. Although the plant is perennial, a new 

 stock should be started about every other year. It is increased 

 also by suckers or division of the stools, particularly when it is 

 desired to perpetuate special varieties or strains. Seeds are likely 



