452 
North American herbarium, as far as we can determine. We 
have searched diligently for it both in the field and in several col- 
lections, and have come to the conclusion that this mountain form 
of D. heteromalla with curved pedicels has been mistaken for it. 
It is recorded in the Manual from two localities only: 
“On sandstone rocks, Lancaster, Pennsylvania (T. C. Porter), 
and from the White Mountains (James). Very rare.” 
Dr. Porter very kindly sent us a bit of his specimen, and it 
does not match European specimens of D. curvata. It seems ref- 
erable to depauperate specimens of D. heteromalla var. orthocarpa. 
The White Mountain specimens cited have not been found in the 
herbarium of T. P. James. Macoun does not record it from any 
locality in Canada, nor have we any other record of its having 
been collected by anyone else. 
3. NOTES ON THE GENUS LEERSIA, HEDW. 
Leersia Hedw. Fund. Musc. 2: 88. 1782. 
ENcALypTa Schreb. Gen. 2: 759. 1791. 
This genus is much in need of revision, but we have not been 
able to take the time to do more than set right two or three gla- 
ring mistakes which have come to our notice, in studying the 
Eastern species, and to call attention to collectors in our Western 
and Northern States to the importance of securing good and 
abundant specimens. 
There are five species known to occur in the eastern part of 
the continent, L. extinctoria (E. vulgaris) L. laciniata (E. ciliata) L. 
rhabdocarpa, L. procera and L. contorta (E. streptocarpa). One of 
the Eastern species LZ. rhabdocarpa has been found in Quebec, 
but not yet credited to the United States, it is hoped that it will 
be found in the mountains of New England if attention is called 
to the genus. 
Of the additions in Macoun’s catalogue, £. subspathulata, E. 
leiomitra, E. leiocarpa and E, cucullata are from British Columbia, 
or Athabasca, and although Prof. Macoun has generously furnished 
us with all his collection of this genus, and allowed us to keep 
duplicates, yet we have not felt warranted in taking the time . 
present to compare the specimens carefully. We have thought rf 
