266 Observations upon the effects of Frost, 



Garden they were all, without exception, killed to the ground, 

 but shot up again from the root. The variety called Noblea- 

 num was uninjured at Norwich. Mr. Walker found that the 

 hybrids between R. arboreum and R. Catawbiense or caucasi- 

 cum stood well at Calderstone, so did R. altaclerense. Mr. 

 John Wilson states that at Osberton in Nottinghamshire, 

 where the thermometer fell to 2° below zero, the hybrid rho- 

 dodendrons, of which there is an extensive collection, although 

 much injured, all recovered and pushed forth new buds 

 vigorously. In Mr. Garnier's garden, at Bishopstoke in 

 Hampshire, R. Smithii and some others lost their leaves or be- 

 came a little brown ; but the Highclere hybrids stood perfectly 

 well. With regard to the hybrids, and Indian species, Mr. 

 Herbert's observations at Spofforth are as follow ; — " My 

 seedling Rhododendrons from arboreum by the rose-coloured 

 ponticum have not lost the foreright shoots, though the leaf is 

 damaged, answering in that respect my expectations, that 

 they would approximate to the constitution of the hardier 

 male. R. altaclerense, from Catawbiense-ponticum by arbo- 

 reum, is disfigured in some situations, and scarcely touched in 

 others, but the foreright buds and flower-buds were unhurt. 

 R. Linclsayi from the American arborescens, ( maximum var. 

 purpureum of Pursh,) is not much injured. A plant of it 

 taken up to be forced, after the severest night, when the snow 

 was melting, flowered splendidly and its leaves were unhurt. 

 R. Haylocki, from Catawbiense by arboreum, has received no 

 injury, and bids fair to flower profusely. R. Knightii, from 

 the rose-coloured cinnamon leaved arboreum by caucasicum, 

 is uninjured, and now (April 26th) in flower. R. Achlandi, 

 from altaclerense crossed again by the scarlet arboreum, is 

 killed near to the ground, those from Haylocki, by arboi^eum, 

 the same. The scarlet arboreum, against the front wall of 

 the stable covered loosely with a single mat, was killed nearly 



