Nov. 1891.] THE BOTANICAL SOCIETY OF EDINBURGH. 



203 



On Temperature and Vegetation in the Eoyal Botanic 

 Garden, during July, August, September, and October 

 1891. By Egbert Lindsay, Curator of the Garden. 



JULY. 



The month of July was for the greater part changeable 



and inclement ; there was a marked abscDce of real summer 



warmth. The lowest night temperature was 42°, which 



occurred on the 10th of the month, and the highest 54°, on 



the I7th. The lowest day temperature was 63°, on the 16th, 



and the highest 79°, on the l7th. Eoses were unusually fine, 



although late in commencing to flower. Herbaceous plants 



generally were also good. On the rock-garden 252 species 



and well-marked varieties came into flower as against 204 



for the corresponding month last year. A few of the more 



interesting were : — Aquilcgia ijyrenaica, Anomatheca crucnta, 



Astragalus alopecuroiclcs, Calamintha patavina, Campanula 



Waldsteiniana, Dianthus negledus, I), cinnabarinus, Cyan- 



anthus lobatus, Epilobium obcordatum, Eriogonum aureum, 



Gentiana septemjida, G. tihetica, Hypericum reptans, Galium 



ruhrum, Linaria origanifolia, Mimulus roseus, Palava 



fiexuosa, Pentstemon speciosum, Potentilla lanuginosa, Saxi- 



fraga diversifolia, Senecio laxijlora, Sivertia midticaulis, 



Veronica elliptica, and V. rakaicnsis, &c. 



Readings of exposed Thermometer at the Rock-Garden of the 

 Royal Botanic Garden, Edinburgh, during July 1891. 



