]\Ir U. Lindsay's Report on O'jicn-Air Vegetation. 229 



During the month of April vegetation generally made 

 good progress. The weather during the latter half of the 

 month was mild and genial, frequent light showers of rain 

 and hriglit sunshine alternated, and these conditions, com- 

 bined with southerly winds, caused vegetation to make 

 rapid progress. Many deciduous trees had their leaves 

 well developed at the end of the month. Pear, Cherry, 

 and Currant were in full flower and well laden ; Apple 

 blossom being also well advanced. Although a great deal 

 of frost occurred, little or no damage was done, owing 

 chiefly to the lateness of the season. The thermometer 

 was below the freezing-point on ten occasions, indicating 

 27° of frost collectively, as against 37° for the corresponding 

 month last year. The lowest readings were on the 2nd, 

 29°; 4tli, 25°; 9th, 28°; 14th, 28°; 15th, 27". The highest 

 morning readings were on the 19th, 61°; 20th, 53°; 

 21st, 55°; 27th, 54°; 30th, 55°. The lowest day tempera- 

 ture was 42°, which occurred on the 8th, and the highest 

 68°, on the 19th. 



The aggregate amount of frost registered this season up 

 till the end of April is 466°, while for the same period last 

 season 163° only were registered. The lowest point 

 reached this season was 18° Fahr., or 14° of frost, which 

 occurred on January 23. The following are the amounts 

 of frost registered for each month, viz. : — October, 7°; 

 November, 64°; December, 86°; January 70°; February, 

 67°; March, 82°; April, 27°. 



The rock garden was very gay during the month ; 182 

 species and varieties of alpine plants came into bloom, 

 making a total of 280 since January 1, as compared with 

 225 for the same period last year. Amongst the most con- 

 spicuous plants which flowered were — 



Adonis vernalis. Dentaria enneaphyUa. 



Audrosace cariiea. Corbularia Graelsi. 



coronopifolia. Epigasa repens. 



Laggerii. Gentiana verna. 



foliosa. Helonias bullata. 



Aubrietia Hendersoni. Iberis pctrrea. 



Anemone fulgens. Narcissus Bulbocodium minor. 



Robiiisoniana. Emperor. 



Pulsatilla. Empress, &c. 



Diuba Maweana. incomparabilis,SirWatkin 



TRANS. BOT. SOC. VOL. XVI. Q 



