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LIST OF RHODODENDRON SPECIES GROWING AT LEONARDSLEE, 
NEAR HORSHAM, SUSSEX, SEPTEMBER, 1918. 
INTRODUCTORY NOTE. 
Sir Edmund Loder very kindly consented to compile the following list of 
Rhododendron species growing in his garden at Leonardslee. 
In reply to my enquiries. Sir Edmund, in a letter dated 24th February, 1919, 
writes ;— 
" I call R. ARBOREUM VAR. ciNNAMONEUM the Same thing as R. arboreum 
ALBUM. This is a distinct thing, described by Hooker as having red underneath 
the leaf and spotted white flowers. There are very many varieties of 
R. ARBOREUM with white flowers, and these I call R. arboreum var. album. 
As regards R. coombense, the business is comphcated, but I think I made 
it out once ;— 
R. YANTHiNUM, Bureau et Franchet. Jour, de Bot. V., 94. [Syn. R. con- 
ciNNUM, Hemsl. et Wils. in Kew Bulk, 1910, 115, not R. concinnum, Hemsl.'] 
R. CONCINNUM, Hemsl. Jour. Linn. Soc., XXVL, 21. [Syn. R. coombense, 
Hemsl., in Bot. Mag., T. 8280]. 
As regards R. japonicum, my plant is an azalioid and was raised from seed 
sent by Professor Sargent (No. 7670), and may be R. molle. 
R. Baileyi was raised from seeds collected by Colonel Bailey, in Bhotan, 
near Nyasjang ; almost all the other plants raised from seeds sent by him look 
like varieties of R. arboreum.” 
Regarding R. japonicum. Professor Bayley Balfour, writing to me on March 
1st, 1919, says : “ The name R. japonicum was tentatively given by Suringar 
in 1908 to the old R. molle, Miquel. The American authorities have taken up 
this name. (See Plantae Wilsonianae, L, p. 549.) The name R. japonicum 
was given by Schneider, in 1909, to the old R. Metternichii, Sieh. et Zucc., 
and this name has been taken up by Kew in the Botanical Magazine.” 
It has for some time been doubted whether any old plants (the true wild 
form) of either R. molle or R. sinense are in this country, and in answer to a 
question as to this. Professor Bayley Balfour writes under the same date : 
“ The two questions which you ask about old plants of R. molle and of R. 
SINENSE I cannot answer. The hope of getting such an answer was the reason 
of the delay in the publication of a paper which I wrote three years ago 
for the Botanical Society of Edinburgh, dealing with this question of R. 
japonicum. Regarding the relationship between R. molle and R. sinense 
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