HARDY SHRUBS IN GREENHOUSE 277 



is suitable for the Pernettyas. The fruits are very 

 charming. 



PHILADELPHIA (Mock Orange). This in its several 

 forms may be lifted in the autumn and flowered well 

 the following spring, not early, as the forcing must 

 be very gentle. Even then the perfume of P. 

 coronarius is too powerful to be pleasant in a con- 

 fined space. This objection cannot, however, be urged 

 against M. Lemoine's hybrids between this species 

 and the pretty little Mexican P. microphyllus, which has 

 a fragrance like that of ripe apples. These newer 

 hybrids Avalanche, Boule d' Argent, Gerbe de Neige, 

 Manteau d'Hermine, Mont Blanc, and Lemoinei are 

 all worth a place either in the open ground or for 

 flowering in pots. 



PRUNUS. Several classes that were at one time 

 considered as separate genera are now included in 

 the genus Prunus, which was formerly limited to the 

 Plum family. Now the Cherries, Almonds, and 

 Peaches are only sections of the genus Prunus, as 

 explained elsewhere in this book, but as they are 

 better known under their respective names it will be 

 wiser to refer to them thus. The Cherries (Cerasus) 

 have been added to considerably of recent years, 

 several varieties having come from Japan, mostly of 

 P. (Cerasus) pseudo-cerasus. These, which include 

 such varieties as Sieboldi, Watereri, and J. H. Veitch, 

 all flower freely when quite small, an important point 

 when considering plants needed for flowering under 

 glass. Where larger plants are required the double 

 form of the Wild Cherry (P. Avium) is very beautiful. 



