Mar. 1892.] THE BOTANICAL SOCIETY OF EDINBURGH. 333 



Ulinus campcstris, jEscuIus Hippocastanum, Fagus sylvatica, 

 ^^alix sp., among ihe Deciduous group ; Abies Lowiana and 

 Ah. grand is among the Pinacea}. Ulmv.s twice, and Populus 

 once, increased 0"65 in a single montli ; Abies Lowiana 

 three times attained 0"60. These are the maxima. 



Comparison of the Monthly Fercentaye of Girtli- Increase in 

 the Older and Younger Groups : — 



In the Deciduous trees the chief difference is the pre- 

 ponderance of April and July in the older set. The former 

 is apparently partly due to a falling oft' soon after the spring 

 start in many of the old trees rather than to a greater 

 amount of increase in April itself. 'J'he preponderance of 

 July among the older trees may be characteristic of age or 

 infirmity, but requires further explanation. In the Coniferai 

 the differences are not greater than might be expected in two 

 groups observed at different periods of time, and only partly 

 of the same species. 



A Xew South Afkicax Alga, Fhacelocaipus discigcr, 

 Holmes. By E. M. Holmes, F.L.S. 



Poisoning of Sheep by Pierisfloribunda, Benth. et Hook. f. 

 {Andromeda jloribunda, Pursh.). By Egbert Lindsay. 



About three weeks ago I received a letter from Colonel 

 Nimmo, Westbank, Falkirk, enquiring if it was well known 

 that Fieris floribiiiida {Aiulromcda floQ'ibunda, Pursh.) was a 

 poisonous plant. He stated that two weeks previously a 

 score of sheep were put into a field to eat down the foggage, 

 when two of them died. Along one side of the field is a 



