122 THE NURSERY-BOOK. 



Arnatto. See Bixa. 

 Arnebia. Boraginece. 



Increased by seeds. Cuttings of the strong shoots should 

 be inserted in pots of sandy soil, and placed in gentle heat. 



Arnica. Compositce. 



Propagated by seeds sown in a cold frame in spring, and 

 by divisions, which should be made in spring. 



Aronicum. See Doronicum. 

 Arracacha. Umbelliferce. 



Increased by divisions of the roots. 

 Arrow-root. SeeCalathea. 

 Arrhostoxylum. See Ruellia. 

 Artabotrys. Anonacece. 



Propagated by seeds ; and by cuttings of ripened wood, 

 placed in early spring in sand under a frame, with bottom 

 heat. 

 Artanema. Scrophulariacece. 



Increased readily by seeds and cuttings. 

 Artanthe. See Piper. 



Artemisia (Mugwort, Southernwood, Wormwood). Composite. 

 The annuals by seeds ; the herbaceous ones, by dividing 

 at the root ; the shrubby kinds by cuttings. 



Arthropodium. Lihacece. 



Increased freely by seeds and by divisions. 

 Arthrostemma. Melastomacece. 



Propagated by cuttings of small firm side shoots, which 

 will root, in April or August, under a hand-glass in sandy 

 soil. 



Artichoke (Cynara Scolymtis}. Compositce. 



Usually grown from seeds. Although the plant is peren- 

 nial, a new stock should be started about every other year. 

 It may be increased also by suckers or divisions of the stools. 



Artichoke, Jerusalem (Helianthus tuberosus]. Composite. 



Commonly increased by means of the tubers, which may 

 be planted whole or cut into eyes, after the manner of pota- 

 toes. Seeds are very rarely used. 



