209 
York, where a few hours were spent. Between seven and eight 
hundred specimens were obtained during the month, about two 
hundred of which will be available for exchange. 
Number 23, Vol. VIL, of the Bulletin of the New Vork Botan- 
ical Garden, containing an illustrated guide to the grounds, 
buildings and collections of the Garden, to which is appended a 
sa uint list of the native trees of th udson River Valley, 
was issued August 27, 1909. This bulletin is published in co- 
eae with the Hudson-Fulton Celebration Commission. It 
will be distributed free to all members of the Garden and an 
edition will be sold on the grounds at twenty-five cents a copy. 
Circular No. 35 of the VU. S. eicaasaas o pes by 
Perley Spaulding, deals with th f the white 
pine-blights in the United States. During the last five years com-~ 
plaints of white pine leaf-blight have been coming in, which com- 
plaints are becoming more frequent from year toyear. The case 
is of special importance since we are now dependent upon second 
growth of white pine for our lumber supply, and the young 
white pine is especially susceptible to diseases which may result 
from the most trivial wou 
The blight is chatscterved by the death of the apical portion 
of the leaf which may extend over one fourth or one third of its 
length or entirely to the base, causing premature falling of the 
leaves. During the early stages of the disease the leaves be- 
come reddish-brown, but a few months later the color fades so 
as to be much less conspicuous, which change of color is likely 
to be mistaken for an improved condition of the disease. 
The leaf-blight is known to extend from the southern part of 
Maine and northern New Hampshire and Vermont to the Hud- 
son valley, central Pennsylvania and along the Alleghanies to 
western North Carolina, but apparently does not occur in the 
higher peas of the north, as it has not yet been found in the 
Adiron 
see species of fungi have been found to accompany the 
blight, any one or all of which may have to do with its existence. 
Such physiological factors as winter-killing, sun-scald, injurious 
