262 



Observations upon the effects of Frost, 



not everywhere. M. glauca, which had stood out at Spof- 

 forth for 23 years, had all its buds and small branches killed ; 

 it sustained no damage about London, where the cold was far 

 more severe. At Glasgow, the only species which did not 

 suffer was M. acuminata. 



Pinus palustris was killed in several places, and much injured in 

 others, although protected ; but at Dropmore and Brenchley 

 it was not much damaged; it was unhurt at Carclew. P. 

 mitis 15 feet high was killed at Dropmore. P. ponderosa 

 proved hardy everywhere. P. Sabiniana is reported safe 

 everywhere except at Chipstead in Kent where it was killed, 

 and at Belsay, where it was uninjured ; I should however re- 

 mark, that P. macrocarpa and P. Sabiniana have been mixed 

 in the gardens under the same name, and as the latter is re- 

 ported from Rolleston to be killed, it is not improbable that 

 it is the same plant which under the name of Sabiniana has 

 suffered elsewhere. In the Society's Garden, neither were 

 injured. P. leiophylla proves too tender for England. 



Pyrus angustifolia was killed in the Society's Garden, and suffered 

 much elsewhere. 



Pontederia cor data, and P. angustifolia, lost the stems and 

 leaves above water at Carclew, but the roots of both were un- 

 hurt and grew again. 



Quercus Phellos, and its varieties, were uninjured in the Society's 

 Garden. 



Rhododendron. No American species suffered materially any- 

 where. 



Sideroxylon lycioides was only slightly injured in the Society's 

 Garden. 



Vaccinium ovatum, a very beautiful evergreen, was not the least 



affected anywhere. 

 Schizandra coccinea was killed in the Society's Garden on a 



south wall. 



