378 THE NURSERY-MANUAL 



seeds are imported by the dealers, and if fresh and fully ripe they 

 germinate well although some of them start slowly. The period 

 of germination runs from two or three weeks to as many years. 

 The seeds are usually started singly in 6-inch pots. 



Some of the species sucker freely from the crown as they mature, 

 and these offsets may be removed and repotted singly. A few of 

 them stool, and may be divided. 



Panax : Ginseng, Polyscias. 



Pancratium and Hymenocallis. Amaryllidacece. 



Seeds, sown in pots or pans in heat, are sometimes employed. 

 They should give blooming plants in two or three years. Commonly 

 increased by offsets, which usually form freely. Place the offsets 

 rather close in pans in a light mixture of equal parts of leaf-mold, 

 peat and sand, giving good drainage. 



Pandanus (Screw-Pine). Pandanaceoe. 



Propagated by seeds and suckers, as for palms ; also by cuttings 

 of the young growth in heat. The " seeds" are really fruits, and if in 

 good condition several plants, one to ten, are obtainable from each ; 

 they should be separated when well furnished with roots. These 

 seeds are easily obtained from the tropics, and are planted in moist 

 black soil in beds or pots. When the plants appear, the little clumps 

 are separated and the plantlets potted off. Suckers often form freely 

 on or near the crown ; these may be taken off and potted singly. 



Pandorea. Bignoniacece. 



Propagated by seeds and by greenwood cuttings under glass. 



Pansy (Viola tricolor). Violacece. 



Propagated by seeds, sown from July 10 to August 25 for the 

 next year's spring bloom. The plants may be carried over in a 

 frame, or in mild climates left directly in the seed-bed and protected 

 with loose mulch. Sometimes started indoors in spring or late 

 winter. Good plants may be purchased from regular growers. 

 Named varieties may be multiplied late in the season from cuttings 

 or layers. 



Papaver (Poppy). Papavcracece. 



Increased by seeds usually sown outdoors where plants are to 

 stand and division. P. orientale and allied species are easily 

 propagated by root-cuttings in sand under glass in autumn. 



