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Huntington) ; West Newbury {Miss C. C. Haynes). Connecticut: Westville 
( R . Veitch, A. IV. E.): New Haven and Orange (D. C. Eaton ) : Hamden 
( D . C. Eaton , ^ 4 . W. E.)\ New Haven and Orange (E. C. Eaton); Ham- 
den ( D . C. Eaton , A. W. E.) The Westville specimens collected by the 
writer in April, 1903, may be designated the type. The following stations 
beyond the limits of New England may also be noted: Quaker Bridge, New 
Jersey ( A . IV. E.) ; Washington, D. C. (/. M. Holzinger) ; Tibbs Run, 
West Virginia {A. LeRoy Andrews ) : Dickey’s Creek, Virginia {Mrs. Britton 
& Miss Vail); Enterprise, Florida {L.'M. Underwood). 
The leaf subtending a lateral branch in L. sylvatica is sometimes bifid 
and sometimes undivided; in other cases there is no subtending leaf what- 
ever. The latter condition in fact is normally found on one side of a branch- 
ing axis while subtending leaves occur on the other. The absence of such a 
leaf indicates that the whole, instead of a part, of an apical segment has 
entered into the formation of the branch. This substitution of a branch for 
an entire leaf is of special interest and has not before been noted in the 
Hepaticae, although its occurrence was long ago suspected by Leitgeb. The 
subtending leaves are sometimes found on the left, according to the direc- 
tion of the spiral. Similar variations also occur in L. setacea 
In their vegetative organs L. setacea and L. sylvatica resemble each 
other very closely, and it is sometimes difficult to determine sterile and 
poorly developed material. Usually, however, the leaves and especially the 
underleaves offer a few reliable points of difference. Under favorable con- 
ditions L. setacea is more robust, and its leaves are more regularly quad- 
rifid ; in many cases the antical segment bears an accessory tooth on its free 
margin, a condition which is exceedingly rare in L sylvatica. Occasionally 
a bifid subtending leaf will show an accessory tooth of this character on each 
side. The cutitle of L. setacea is distinctly verruculose while that of L. 
sylvatica is smooth or very indistinctly roughened. Unfortunately in slen- 
der forms of L. setacea these differences are not always apparent. 
New Haven, Conn. 
