342 THE NURSERY-MANUAL 



Juncus (Rush. Bulrush). Juncaceoe. 

 Propagated by seeds, the perennials also by division. 



Juneberry (Amelanchier species). Rosaceoe. 



Increased by using the sprouts which form freely about the old 

 plants ; also by seeds. The cultivated dwarf Juneberry is multi- 

 plied by suckers. Budding and grafting on seedling stocks may 

 also be employed. See Amelanchier. 



Juniperus (Juniper. Red Cedar. Savin). Pinacece. 



Increased readily by seeds, which, however, often lie dormant 

 until the second year and sometimes even to the third year. Red 

 cedar seed is one of the kinds which lie dormant a year. They 

 germinate more readily if the pulp is removed by maceration or by 

 soaking with ashes for a few days. Green cuttings, in sand under 

 glass, root easily; or mature cuttings may be taken in fall and 

 placed in a coldframe, in which they will need little protection 

 during winter. Some varieties require a long time to root, even 

 twelve to eighteen months. Most of the named varieties may be 

 grafted on imported Irish stocks, which are much used in some 

 parts of the country. They may be veneer-grafted and handled 

 in a cool house. The shrubby species, especially J. Sabina, are also 

 propagated by layers. Fig. 95. 



Jussiaea. Onagraceoe. 



Increased by seed sown in fall or spring in shallow water, using 

 seed-pans or pots ; cover seed with finely sifted soil, place pot in 

 water but do not submerge until the second day. 



Justicia. AcanthacecB. 



Most of the plants commonly cultivated as justicias are jacobinias, 

 which see. The true justicias are propagated by cuttings of 

 firm wood, usually in late winter or spring under glass. 



Kadsura. Magnoliacece. 



Increased by seeds ; and by cuttings of nearly ripened wood 

 under glass. 



Kafir, Kafir-Corn (Holcus Sorghum). Graminece. 

 By seeds, as for maize. 



Kaki: Persimmon. 



