X HISTORICAL NOTE. 
From the cireumstances of the case the enumeration of the 
species, of which we now possess material or know of the 
existence in other herbaria, is admittedly unequal. The number 
of those for instance contained in Part 1 would probably from 
present knowledge have to be increased by a third. This has 
been as far as possible remedied by the list drawn up by Miss M. 
Smith of the new species published during the progress of the 
work and of those already described whose area has since been 
found to extend to China. 
The usefulness of the whole work has been enormously 
enhanced by the complete index of all names cited including 
synonyms. It contains seme 17,000 entries, and is due to the 
indefatigable industry of Mr. Daydon Jaekson, the Society'a 
General Secretary. 
No useful purpose would be served by an attempt to specify 
all those who have supplied the material which has been used in 
preparing the Enumeration. Their names are given throughout 
under the species they contributed. Full partieulars for the 
most part will be found about them in Bretschneider's exhaustive 
" History of European Botanical Discoveries in China,” published 
in 1898. 
A few exceptions must, however, be made. Dr. Mance who, 
to use the words of Bretschneider, * has connected his name for 
all time with the Flora of China,” died June 22, 1886, as already 
noticed, after the appearance of the first part. His Herbarium 
of Asiatie plants containing upwards of 22,000 species was 
acquired by the British Museum. 
Dr. Henry’s important collections were, as also already 
noticed, not available for the first part and only to a small 
extent for the second. From that point they were continuously 
drawn upon as they successively reached this country. 
Dr. Henry also obtained for the Kew Herbarium Dr. Ernst 
Faber's important collection from Mt. Omei as well as Morse's 
from Kwangsi and Ducloux's from Yunnan. Faber's own her- 
barium was afterwards destroyed by fire. His plants are taken 
up in the Enumeration from the fifth part onwards. 
The extraordinary richness of the flora of Western and Central 
China as revealed by Henry’s collections, induced Messrs. Veitch 
to send out Mr. E. H. Wilson to make further botanical explora- 
tions. He made two journeys—the first in 1899, when he arrived 
at Szemao to see Henry, and the second in 1903. Messrs. James 
