YORKSHIRE NATURALISTS’ UNION 
In view of many difficulties arising in connection with the 
proposed visit of the Yorkshire Naturalists’ Union to Doncaster 
on September 19th, it has been decided to postpone the excursion. 
An entirely New Work bringing the Vegetational History 
of the County quite up-to-date. 
THE VEGETATION OF 
YORKSHIRE 
Its History and Associations on the lines of Botanical Survey, 
based on the Geologic and Phyto-palaeologic remains : being an 
examination into the sources, the presence or passing of the 
Floristic Constituents — their When, How and Where ; being also 
a Supplement to previous “Floras” of York, and a list of the 
Localities and Species, newly classified, " New ” to the County or 
some of its river-basins since 1888. 
By F. ARNOLD LEES 
M.R.CS.Eng., L.R.GP.Lond. 
Author (jointly with J. W. Davis) of “ West Yorkshire” (1878), 
“ The Flora of W. Yorkshire ” 1888, and “ Reports of the 
Botanical Record Club ” (1873-1887). 
(The Brambles have been synopsised by Arnold E. Bradley, who is thus 
responsible for that Section). 
Demy 8 vo, on ivhile unsized paper, about 500 pages, 
to be subscribed at 12 6 net ( 16 /- net strictly after publication) 
If you have not yet received a prospectus of this work you are 
invited to apply at once. 
LONDON : 
A. BROWN & SONS, LTD, 5 Farringdon Avenue, E.C. 
And at Hull & York. 
