TRANSACTIONS 



OF THE 



ROYAL 

 SCOTTISH ARBORIOULTDRAL SOCIETY. 



A. W. BOETHWICK, D.Sc, 



HONORARY EDITOR. 



EOBEET GALLOWAY, S.S.O., 



SECRETARY AND TREASURER 



VOL. XXXIV. 



EDINBUKGH: 



PEINTED FOE THE SOCIETY. 



SOLD BY DOUGLAS & FOULIS, CASTLE STREET. 



1920. 



