298 THE NURSERff LIST. 



Phyteuma, Rapunculus (Horned Rampion). Campanulacecz. 

 Easily increased by seeds or by division, in spring. 



Phytolacca (Spoke, Skoke, Poke). Phytolaccacece. 



May be propagated by means of seeds, or by division. 



Picea (Spruce). Conifer ce. 



Propagated by seeds, sometimes by layers, or grafts. 

 Seedlings must be shaded the first year. Also by cut- 

 tings of recent wood (Fig. 67 and page 64). The spruces 

 are easily grafted. P. excelsa (Norway spruce) makes 

 a good stock ; the veneer-graft, under glass, in winter, 

 succeeds better than any method of outdoor work prac- 

 ticable in our climate ; if the graft is inserted near the 

 base in young plants, it is quite possible to obtain them 

 on their own roots after a few transplanting^. Side shoots 

 can be used as cions, and if started in time will furnish 

 good leaders ; sometimes a leader is developed more 

 rapidly by bending the plant over at nearly a right angle, 

 when a stout bud may start from the stem. The Balsam 

 fir is also a good stock. See Abies. 



Pickerel Weed. See Pontederia. 



Picotee. See Dianthus and Carnation. 



Pie-plant. See Rheum. 



Pilea (Artillery Plant, Stingless Nettle). Urticacecz. 



May be increased by seeds, division or cuttings, com- 

 monly the last. 



Pilocereus. See Cactus. 

 Pimpernel. See Anagallis. 

 Pinanga. Palma-cecs. 



Propagated by seeds. 

 Pinckneya. Rubiacetz. 



Seeds. Cuttings of the ripened shoots under glass. 



Pine-apple ( Ananas sativus ) . Bromeliacece. 



Pine-apples very rarely produce seeds, but when they 

 are produced they are sown for the purpose of obtaining 

 new varieties. The pine-apple is usually increased by 

 suckers and "crowns." If the root is left in the ground 

 after the pine is removed, suckers will start from it. The 

 root is then taken up and cut into as many pieces as there 

 are suckers, each piece being then permanently planted. 



