Report on Temperatures and Open-Air Vegetation. 159 



were on the 12tb, 57' ; 22nd, 59' ; 23rJ, 62° ; 25th, 02' ; 

 31st, 58°. In the rock garden 228 species of alpine and her- 

 baceous plants came into flower during the month, as against 

 243 for the same month last year, making a total of 455 

 since January 1st, as compared with 446 for the same period 

 last year. A large proportion of those which began to 

 flower in March and April coutiuued to flower during May, 

 thus rendering the garden very attractive. 



Jtme. — During the past month outdoor vegetation was 

 much retarded, owing to the extreme drought which pre- 

 vailed. There were twenty-three dry days. Slight showers 

 of rain fell on seven days, viz., the 5th, 6th, 13th, 22nd, 

 23rd, 24th, and 29th. The lowest night temperature for 

 June was 42°, on the nights of the 7th and 9th ; the highest, 

 58°, on the 29th. The lowest day temperature was 56°, 

 which occurred on the 5th ; and the highest, 80°, on the 

 28th. In consequence of the want of rain, along with the 

 mildness of the past winter, aphides, caterpillars, and other 

 insect pests were very numerous and destructive, especially 

 on Beeches, Elm, Holly, Grooseberry, and Currant; Roses, 

 however, were tolerably clean and well budded. Late 

 varieties of Ehododeudron and Azalea were inferior. All 

 late transplanted trees and shrubs suffered severely from 

 drought. Most coniferous plants — Piceas, Abies, and 

 Cedrus in particular — developed fine healthy shoots. The 

 golden variegated forms of Biota, Retinospora, Cupresstis, 

 and Taxus coloured extremely well. On the rock garden 

 346 species and varieties of dwarf-growing herbaceous and 

 alpine plants came into flower during the month, making 

 a total of 798 for the season, as compared with 701 at cor- 

 responding date last year. 



[Table 



