JOUENAL 
OF THE 
ROYAL HORTICULTURAL SOCIETY 
ESTABLISHED 
A.D. 1804 
ROYAL CHARTERS 
A.D. 1809, 1860, 1899 
EDITED BY 
F. J. CHITTENDEN, P.L.S., V.M.H., 
AND 
REV. W. WILKS, M.A., V.M.H. 
VOL. XLVI. 
1920-21 
The whole of the Contents of this Volume are Copyright. For permission to reproduce 
any of the Article application should be mad£- to the Council of the Society. 
LONDON 
SOLD BY 
THE ROYAL HORTICULTURAL SOCIETY, R.H. HALL, VINCENT SQ., S.W. L 
