THE MADDENI SERIES OF 
RHODODENDRON. 
BY 
J. HUTCHINSON, F.L.S., 
Assistant for India in the Herbarium, Royal Gardens, Kew. 
In the absence of a monograph of Rhododendron, the material 
for which is as yet far from adequate, it seems convenient to 
select, as Professor Bayley Balfour* has done, a fairly well-known 
species as the typical representative of a particular “‘ series” 
or group, and to bring our knowledge of that group as much 
as possible up to date. The present contribution deals in such 
a-manner with Rhododendron Maddeni, Hook. f., R. Dalhousiae, 
Hook. f., R. cilitcalyx, Franch., and the species closely allied 
to them; and this group for the sake of convenience may be 
called the ‘‘ Maddeni series.’’ This series, however, is no doubt 
a composite one, and contains three fairly well-marked but 
closely associated subordinate groups, each of which would more 
exactly correspond with Professor Bayley Balfour’s conception 
of a “series.” It includes practically all the larger-leaved 
Indian Rhododendrons with Jepidote leaves, and their Chinese 
relatives. 
This revision owes its conception entirely to the enthusiasm 
and encouragement of Professor Bayley Balfour, with whom the 
writer had lately the pleasure of comparing notes on a number 
of troublesome taxonomic questions regarding certain species 
of Rhododendron. The advantages of such to the writer of 
this paper will be obvious to all who know this large and 
difficult genus. Any special merits the present work may 
possess are due to the fact that the author has had for study 
the whole of the Edinburgh material of the series, including 
the beautifully preserved and fully annotated Yunnan collections 
of Mr George Forrest, with much other material gathered in 
Bhutan by Mr R. E. Cooper, and in Burma and Yunnan by 
Mr Kingdon Ward. 
* Rhododendrons of the Irroratum Series, Trans. and Proc. Bot. Soc, 
Edin. xxvii. 157-220 (1917). : 
R.B.G., Edin., No. LVI, July 1919.) 
. 11480/138—400--9/19-—N. & Co., Ltd. Gp. 10. A 
