DICRANUM UNDULATUM AS A NATIVE OF ENGLAND. 175 
DICRANUM UNDULATUM, Ehrh, AS A NATIVE OF 
} ENGLAND. 
By Henry Boswett. 
Muc has been said and written during a long time past on the 
supposed discovery of Dicranum undulatum, Ebrh., in Britain, and 
from time to time I have received from various friends and correspon- 
dents specimens purporting to be that moss; but however specious 
their first appearance might be they all alike broke down on the 
slightest examination, and could not be suffered to pass muster as the 
genuine thing; all alike failed to possess the true characteristics of 
the species, and so were laid aside. 
At the beginning of last year a more important attempt was made 
to fix the moss in question as a native of England, in a note* bearin 
; ow, come forward to offer us any 
information upon the point. I should probably have waited longer 
for some abler hand to take the matter up in a final way and end all 
doubts by fully elucidating the question, but that having lately 
ats their first aspect, I have been led to study them closely 
hope that this fine species—one of the handsomest of the handsome 
genus to which it belongs—has really ever been found in this country ; 
_ the puzzling question will still remain why D. undulatum, though 
re both in Nort America and on the European continent, is want- 
oO Be gland, as in the very similar cases of Orthotrichum speciosum, 
oe Hypnum reptile, and some others. | 
thorough examination it will be found that the Stockton 
a 
Forest . ; 
Plant is only a variety, and but a slight one, of the well-known 
ee widely-spread Dieranum palustre, which has grown in a dry place 
OP ee A ce celiaiaeaelaneenraaenanae momen 
* “ Grevillea,” vol. i., p. 108. 
