THE NURSERY-LIST 397 



used for the five-leaved species, and the Scotch or Austrian pine 

 for three-leaved and two-leaved species. 



Piper (Pepper. Cubeb). Piper aceae. 



All pipers are increased by cuttings of the firm-growing shoots 

 in sandy soil under glass ; also by seeds when they are to be had. 



Piqueria. Composites. 



The common Piqueria trinervia (the Sterna serrata of florists) is 

 generally grown from cuttings, like fuchsias and carnations ; also 

 by seeds, which are freely produced, and by division. 



Pistacia. Anacardiaceoe. 



Propagated by seeds, cuttings and layers. The pistachio-nut, 

 pistache, or " green almond " (P. wra), is grown from seeds, which 

 are planted where the trees are to stand. Named varieties of the 

 pistache are often grafted on stocks of P. Terebinthus, or budded on 

 them or other stocks in the nursery row. The best and most avail- 

 able stocks for this country are yet to be determined by longer 

 trial. 



Pistia. Araceos. 



Propagation is by runners, on which new plants are formed. 

 See AracecB, page 239. 



Pisum : Pea. 



Pitcairnia. Bromeliacece. 



Propagation as for billbergia, which see. 



Pitcher-Plant: Nepenthes, Sarracenia. 



Pithecoctenium. Bignoniacece. 



Propagation as for bignonia, which see. 



Pittosporum. Pittosporaceoe. 



Propagated by seeds sown in winter or early spring in ordinary 

 soil in a cool greenhouse, and by cuttings of the growing or half- 

 ripe wood, under glass. Grafting is sometimes practiced, P. undula- 

 tum being one of the best stocks. 



Planera (Water-Elm). Urticacece. 



Propagated by seeds sown soon after ripening in May ; also by 

 layers, and by grafting on the elm. 



