596 THE HOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
are not acuminate ; I believe it to be a Caprea x viminalis hybrid, 
fairly intermediate in foliage. — Edward S. Marshall. 
Salix . [ref. No. 2627]. Tyndrum, Mid Perth, July tqio. 
— G. Claridge Druce. A foliage specimen, from a bush that was 
apparently not in a healthy condition. S. cinerea is the only certain 
factor ; but it is much modified, in the twigs, which are very slender, 
and in the glabrate narrow leaves. These last, which are crenate, 
crenate-serrate, or in places very sharply serrate^ might be accounted 
for by the combination S. cinerea x purptirea^ were it not for the 
stipules, which are quite against that simple explanation, and are 
the stipules of S. lutescens. S. aurita x cinerea x purpurea would 
fit the facts presented, but more than a bit of foliage is needed to 
name it certainly. — E. F. Linton. No inflorescence is present; 
but I feel pretty sure that this is A. atirila x purpurea. — Edward S. 
Marshall. When I gathered it I felt confident that purptcrea was 
one of the parents, and hoped it might be Dofiiana, but although 
repens was in the vicinity, I thought perhaps aurita or cinerea was 
the other parent. There was only one bush in a swampy place 
near the railway. Fruits there were none. — G. Claridge Druce. 
Populus nigra., L. Christ Church Meadow, Oxford, May 1910. 
The leaves from this locality were distributed in 1907 (see ‘ Rep.’ 
p. 309), when the Rev. E. S. Marshall thought they were more 
probably P. canadensis. This is not the case, as it is true P. nigra, 
L., the European Black Poplar, as Mr. A. Bruce Jackson correctly 
pointed out. It is now much the rarer tree in Britain (see ‘ Report,’ 
p. 524). — G. Claridge Druce. P. nigra, L., is native by stream 
sides in eastern England. No one who has seen P. nigra, with 
its rough, gnarled, short bole, and its knotted and outstretching 
branches, could mistake it for the very commonplace “Black 
Italian Poplar,” which is now so very abundantly planted in this 
country. — C. E. Moss. Yes ; the shoots are pubescent, which is 
never the case in the Black Italian Poplar, with which P. nigra is 
sometimes confused. — A. B. Jackson. This is the English Black 
Poplar, which is pubescent. The tree of P. nigra planted at 
Upsala by Linnaeus is perfectly glabrous, and the glabrous form 
is the common one on the continent. — A. Henry. However, 
there are hairy forms of P. nigra on the continent. — C. E. M. 
Listera cordata, Br. [ref No. 89]. Loch an Eilan, Westerness, 
v.-c. 97, June 4, 1910. — McTaggart Cowan, Jun. 
Epipactis latifolia, All. Grass-wood, Grassington, near Skipton, 
v.-c. 64, August 1908, 9, and 10. Mr. R. Rolfe of Kew has 
seen several of these specimens, all of whicli he names as above. 
Grass-wood is rich in Helleborines, Epipactis latifolia, All., being 
