270 Observations upon the effects of Frost, 



Mesembryanthemums, which, usually survive the Cornish winters, 

 and flower freely during summer, were all killed at Carclew. 



Olt: a fragrans was killed against a south wall at Norwich; slightly 

 injured at Carclew. 



Ornithogalum caudatum, with the bulb above ground, was injured 

 but survived at Spofforth. 



Pelargonium flavum, triste, lobatum, had been planted at Clare- 

 mont in a warm border for seven years, and all survived 

 unhurt, though only covered with rotten fern to the depth of 

 an inch, or thereabouts ; there were also several other 

 tuberous rooted species uninjured. Mr. M c Intosh finds, 

 that planting out is the best way to grow all this tribe, as well 

 as most bulbs, which are not evergreen, or retain their leaves. 

 P. triste lived unprotected at Abbotsbury. A large plant of 

 the ivy-leaved Pelargonium, 16 or 17 years old, was killed in 

 a conservatory at Spofforth. 



Richardia qfricana, or Calla cethiopica, with its stem two inches 

 deep in the pond, was killed at Sketty, though it received no 

 material injury from the preceding winter. At Cheshunt, Mr. 

 Harrison has had two large plants in a pond for nine years, 

 without either care, or protection ; they bloom every year, 

 and were not in the least affected by this frost. The plant 

 proved equally hardy at Carclew, both at the edge of a pond, 

 and in the open border. 



Tritoma media was killed at Spofforth ; T. Burchellianaw as unhurt. 



Teucrium fruticans. This pretty free flowering evergreen shrub, 

 nailed to the front of the greenhouse at Carclew, was only 

 killed back to the old wood. 



Erica. Of all the Cape species, which had been turned out in 

 the open ground, the only species which are returned as 

 having survived, at Carclew, are E. concinna and gracilis, 

 where they were protected by a covering of mats. At Fal- 



