152 THE JOURNAL OF BOTANY 
vegetation, and more particularly on lichen-growth. They are of 
opinion that South Lancashire exhibits the deleterious effects of 
smoke on —— to a higher degree over a larger area than is, 
perhaps, the case in any other part o of Great Britain. ey 
think, however, that these adverse conditions have now reached 
thei 
exactly ‘5 describe the state of the lichen-flora as it at present 
exists, so that data may be afforded for purposes of comparison 
at some future time when a regenerated lichen-flora has developed 
under pure con The authors show the extent 
to which the various classes of lichens, more especially those of 
corticolous and rupestral habitats, hay suffered; and in this 
connection the marked influence of a calcareous substratum in 
s i e 
aia lichens of the coast sand-dunes, the lichens of the sand-dune 
heed formation in Britain not having hitherto been specially 
investigated. The characteristic lichens of these dunes and their 
ecological ipo are described. A systematic list of all species 
of lichens found in the vice-county is given; and four new species 
and two het peste are described. 
At the Royal Horticultural Society’s meeting on March 2nd 
Dr, Fotheraill lectured on the scientific pressing of flowers, 
describing an apparatus which he has invented for the purpose ; 
and Colonel Rawson discussed the artificial variations which may 
chocolate-coloured flowers. oe other cases Rogers ak? ipa 
roduced bearing two spurs and aerial tubers to 
sta ws the light had been aaa made of iron or Likes bit it 
was preferable to use natural objects out-of-doors, such as shrubs 
and trees, or under glass the posts and shelves of the greenhouse. 
Yellow flowers were obtained by allowing the plant to be reached 
only by light sun; the strongest sunlight produced purple ee 
intermediate light red. This was true for seasonal as we 
diurnal colour changes. 
Tue recently issued (1914) volume of the Proceedings of the 
Holmesdale Natural History Club Mee vache « Surrey 
Plant Records” i those years by n (who, we are 
sure, did a see a proof), and a Domes oi “ies Ethel Sargant on 
“The Native Countries of our Spring Bulbs,” which — tous a 
model of what lectures should be. The pages are headed 
“ Proceedings’’ throughout—a more useless jadieation could 
hardly boa i ee 
We he Report of the Watson Botanical Ex- 
change a for NES and hope to notice it in our next issue. 
Soi eee. Sa 
Sits dai! ees 
ae ene 
