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THENURSERY-MANUALpeach, while on the plum they may persist twenty-five years ormore. See Almoll,d.The ornamental cherries, peaches, and the like, are propagatedin essentially the same wa,y as the fruit-bearing varieties. P. Lauro-W~CCSU.S and P. IvsitanGx, the cherry laurel and Portugal laurel,may be propagated by short cuttings of ripened wood, in a coolgreenhouse in autumn. P. Pkardii propagates by cuttings of thesoft wood and, with more difficulty, from cuttings of dormant wood.Soft cuttings succeed well with many of the double-flowering plumsand cherries, if the wood is grown under glass. See Apricot, Cherry,Pench, Plum.Pseuderanthemum. Acanthac~~.Propagated by greenwood cuttings any time from March to(J u nc . To this genus are now referred the plants commonly knownas Eranthemum.Pseudolarix (Golden Larch). Enaceae.Should be raised only from seeds ; if grafted on its own rootsor on common larch, it rarely grows into a symmetrical tree.Pseudotsuga. Pimcm.Propagated by seeds, as for abies and pinus ; varieties may begrafted on the type.Psidium : G’uaza.Psoralea. Lqzl n&osce.Propagated by seeds, divisions and cuttings of growing shootsunder glass. The tuberiferous species, as the “ pomme blanche ” orIndian potato (63. escuknia), are increased by the tubers or divisionsof them.Ptelea (Hop Tree). Rutace@.Multiplied by setlds, sown in autumn or stratified, and also bylayers. The varieties may be grafted on the common forms in springunder glass or budded in summer on seedlings of the type.Pteris (Brake. Bracken). Polypod,iacet-e.Easily grown from spores and by division of the rhizomes.Ferns, page 312.Pterocarya. Jugla~~.dace~.Handled by seeds sown in autumn or stratified,qnd layers.Seeand by suckers