[ '23 7 



fureft guide. Thus we find, that throughout the frofty region?,' 

 of the north, the trees, fhrubs, bulbous and perrennials, com-r 

 plete their fhoots, and, before the cold of the winter eamr 

 mences, enclofe in hybernacule or fcaly buds, the embryo, for, 

 the coming year. And there is every reafon to believe that all 

 exotics which ceafe growing, and form thefe buds or hybernacule. 

 in the open air during the courfe of our fummer, will not fufFer 

 from the feverity of our winter. In the hot-houfe many plants 

 complete their (hoots that would not probably do fp in the open 

 air, the heat not being fufEcient to caufe them to grow with the 

 vigour neceffary for their completion before winter. NeverthelefS 

 many of thefe, if not all, might be brought, by enuring them to 

 the open air, to bear our climate. The Camelia Japonica Thea 

 viridis and Calycanthus prascox, which were formerly kept -in 

 the hot-houfe, then in the green-houfe, are now fufficiently 

 naturalized to grow in the open air, and are as little injured 

 with the cold of our winters as either the common or^ Portugal 

 laurels. 



Some exceptions to this obfervation feem to prefent themfelvesi- 

 The Robinia Pfeudo Acacia (two-thorned Acacia) does not form 

 external hybernacule, nor complete its flioots, yet grows wellin 

 our climate ; it however, when the froft comes on early^ lofes 

 a great part of its fumbier fhoots. Several fpecies of 'the 

 Cifius, that ceafe growing on the approach of winter, but form 

 no hybernacule,. live through our mild winters, but fuifer greatly 



Q. 2 in 



