PROPAGATION AND RAISING. 141 



upon should be in robust health, neither having at any 

 time shown symptoms of mildew, and the flowers of both 

 selected from fine and well-formed bunches. The opera- 

 tion of fertilizing is also a delicate one, and there is some 

 difficulty in getting the two sorts to bloom at the same 

 time ; for the exotic will, almost without exception, have 

 to be *under glass; and the native, on account of producing 

 hardiness, should be planted outside. A temporary glass 

 frame to forward the latter would be of service, and the 

 former might be retarded by excluding the light until the 

 buds burst, and keeping the head down in a cold house. 

 The most convenient and certain way is to treat one or 

 more plants of the native kinds as advised for pot culture, 

 and, when the plants are strong enough, to introduce them 

 into a Cold Grapery early in the season, so as to have 

 them in blossom as near as possible to the time of the 

 others which are in the same apartment ; and if attention 

 be paid to the applying of liquid manure, there will not 

 need be any doubt of the fruit lacking nourishment. 

 When the hardy sort begins to open its flowers, the sta- 

 mens should be immediately cut out, and the stigma fer- 

 tilized by the pollen from the anthers of the exotic; indeed 

 it is necessary, if the greatest surety is intended, that the 

 corolla (which fits like a little cap over the parts, and rolls 

 up from the bottom, instead of, as in most flowers, expand- 

 ing at the top) should be carefully removed before its 

 natural liberation, for the anthers generally burst just pre- 

 vious to being exposed ; and as they encircle the stigma, 

 and are immediately over it, impregnation may have then 

 taken place, which will most likely frustrate all hopes; for 

 any hermaphrodite plant, providing all the sexual organs 

 are perfect, will be more readily fertilized by its own than 

 another's pollen. While the mother plant is in bloom, care 

 must be taken to keep off insects. This may be done, by 



