372 Mr Sadler's Re/port on Open-Air Vegetation. 



In February the thermometer was at or below the 

 freezing-point on eight occasions, as against twenty in 

 1881. The lowest readings for the month were — 1st, 32° ; 

 2ud, 29°; 3rd, 30°; 7th, 28°; 9th, 29°; IGth, 29°; 19th, 

 30° ; 28th, 32°. The three highest morning readings 

 (9 A.M.) were on the 8th and 9th (48° and 51° respectively). 



Forty- seven species and varieties of plants CfUrie into 

 flower in the rock garden, amongst them were Galanthus 

 plicatus, G. Ehoesii, Crocus hijlorus, 0. etruscufi, C im- 

 perati, Leucojum vernum, Bulhocodium ver7ium, &c. There 

 also flowered Hellehorus colchicus, white and blue Ilepaticas, 

 the Botanic Garden purple variety of the common prim- 

 rose, as well as yews, and certain species of Ahius, hazel, 

 &c. 



In March the thermometer was at or below the freezing- 

 point on seven difl'erent occasions. The dates were as 

 follows:— 1st, 32°; 7th, 30°; 21st, 31°; 22nd, 30°; 23rd, 

 29°; 25th, 32°; and 26th, 32°. 



Vegetation was six weeks in advance on the 9tli inst. 

 of what it was at the same period in 1881 in the rock 

 garden ; and specimens of the following plants in flower 

 were exhibited at the March meeting of the Botanical 

 Society. 



Sisyrincliium grandiflorum 



(white and purple). 

 Iris reticulata. 

 Hellehorus fcetidus. 



angustifolius. 

 guttatus. 

 orientalis. 



purpurascens minor, 

 viridis. 



olympicus albus. 

 colchicus. 

 Ilepatica angulosa. 

 Daphne Mezereum. 

 Draba aizoon. 



„ aizoides. 

 Dentaria enneaphylla. 

 Aubrietia purpurea. 

 „ grandiflora. 

 „ ccfilestis. 



Hendersuiii. 



Viola species, yellow variety. 

 Lithospermiim prostratum. 

 Andromeda calyculata latifolia. 



„ media. 



Omphalodes verna. 

 Arabis procurrens. 



„ albida. 

 Thlaspi prostrata. 

 Symplocarpus fcetidus. 

 Anemone coronaria. 



„ fulgens. 

 Primula denticulata. 



„ dark variety. 



„ intermedia. 

 Saxifraga crassifolia. 



„ rubra. 



„ media. 

 Primula marginata. 



„ vulgaris. 



„ „ (single white). 



