TREE AND SHRUB LIST 207 



PICKNEYA. 



SEEDS. Grow readily, but the plants are not hardy. 

 PIERIS. 



SEEDS. (See Andromeda.) 



CUTTINGS. Nearly ripe wood. August, under glass. 

 PINUS. Pine. 



SEEDS. Sow in beds, about three feet wide so that they may be 

 weeded. After growing one year transplant them just as buds are 

 swelling. Shade the young plants early in growth, but gradually 

 allow the beds to have the full sunlight, else damping-off will oc- 

 cur. Keep them sparsely watered. 



GRAFTING. Veneer grafting is used to work various rarer varieties 

 on the type. The plants may be potted and grafted indoors. In 

 grafting out of doors the terminal bud graft is best used. (See 

 p. 120.) Fuller writes that the two- and three-leaved sorts, P. syl- 

 vestris, P. Mughus compacta, P. pyrenaica and P. densiflora, should 

 be used in grafting varieties of the same number of needles. The 

 Austrian Pine (P. nigra var. austriaca) may be used as a stock for 

 the Western Pines (P. ponderosa, P. Coulteri, and P. Sabiniana), 

 all of which have coarse grained wood. The rapid, free growing, 

 three-needle sorts are preferred for the others; for example, the 

 Red Pine (P. resinosa) is the best stock for allied species and 

 varieties. The White Pine (P. Strobus) a five-leaf sort, is best used 

 for the other five-leaved species, P. flexilis, P. excelsa, P. Cembra, 

 and P. Mandschurica. 



PLATANUS. Button-wood. Plane Tree. Sycamore. 



*SEEDS. For the Oriental Plane only. Sow in Fall, expose to freezing. 

 CUTTINGS. Hard wood taken in Autumn. Occasionally P. orientalis 

 will root, although more difficult than P. occidentalis. 



POMEGRANATE. See Punica. 

 POPULUS. Poplar. 



*SEEDS. Sow as soon as ripe. Plant shallow, water if soil becomes 



dry. 



*CUTTINGS. Hard wood root easily, one or two-year-old wood used. 

 BUDDING AND GRAFTING. Varieties are worked on rapid growing 

 species. 



POTENTILLA. Shrubby Cinquefoil. Five Finger. 

 SEEDS. 

 CUTTINGS. Mature wood taken in Autumn. 



PRUNUS. Propagation of ornamental species only. 



*SEEDS. Good for species and stocks. See under Peach and Plum, 



p. 137 and 140. 

 CUTTINGS. Mature wood used for some ornamentals and European 



Plum, use long cuttings. 



ROOT CUTTINGS. Plants from cuttings are apt to sucker easily. 

 BUDDING. Shield bud on seedling stock. P. Pissardii may be budded 



on any plum stock. 

 Primus. Amygdalus. Almond (see fig. 102). 



*BUDDING AND GRAFTING. The ornamental horticultural varieties 



are budded on the Peach or the Plum. The Plum is usually preferred 



because it is not attacked by borers and succeeds well hi a clay soil. 



