et in species novas atque affines divisa. 318 
late, acuminate, lightly serrate, the serratures 12—16 on each side; 
fruiting panicle large, notably compound, the primary branches being 
again widely branched, the whole subpyramidal, 8--12 cm wide toward 
the base and only 12--18 em high; drupelets very numerous, smaller 
than in southern allies, 3 mm wide, suborbieular inclining to ovate. 
This definition I trust may prove to include a large part of what has 
been called Rhus glabra in northern New York, New England and 
adjacent Canada. The type specimen in the National Herbarium, Lake 
Waccabue, Westchester County, New York, Mr. C. L. Pollard, August 
19, 1894. The locality lies easily within the range of Colden's field 
studies made in the middle of the eighteenth century or earlier. It 
might therefore be guessed that R. pyramidata also entered into, and 
formed a part, bibliographically speaking, of Linnaeus' aggregate R. glabra. 
But this cannot be established as a fact; nor would it alter the situation 
in the least if it could be; for Colden did not describe the shrub, and 
his work is of later date than that of Dillenius, to which we are obliged 
to resort for any described and definable thing that may bear the appel- 
lation Rhus glabra Linn. 
The Rhus glabrum of Philipp Miller, which he said was from New 
England, and which he reported as cultivated in his time under the 
name of New England Sumach, cannot have been the present species; 
for he attributes to that “downy” branches, as I have already remarked 
under R. glabra. 
There is presumptive evidence in the herbaria of the existence in 
southern New England of at least two more species, the diagnoses of 
which cannot be safely made for want of fruiting panicles. One of these 
I have seen only in the herbarium of the Field Museum, sheets 13682 
and 18510. Both specimens were collected and distributed by the late 
D. C. Eaton, somewhere near New Haven; no date. Another is from 
South Hadley, Mass., 1887; the collectors name illegible. By evident 
marks of foliage and detached flowering panicle this is certainly distinct 
from all others known, and nearest R. ithacensis, unless the panicle be 
pyramidal. 
6. Rhus atrovirens E. L. Greene, l. c., p. 182. 
Stout upright shrub, the young branches and lower face of foliage 
not very glaucous; leaves about 3 dm long, with unusually stout petiole 
and rachis, the whole more firm and ascending than in allied species; 
leaflets about 23 and closely approximate, subcoriaceous, of a dark green 
above, pale but not white beneath, of only middle size, 5—7,5 cm long, 
narrowly oblong-lanceolate, subsessile by an obtuse base, the apex sub- 
ulate-linear, entire, the serratures of the margin, though obscure very 
numerous, 16—22 on each side; panicle of fruit narrowly pyramidal, 
1,5 dm long, compact; drupelets larger, than in the last, quite rotund, 
4 mm wide, deep crimson as in most species. 
Mountain region of northern Alabama; type in the National Museum, 
from near Gadsden, 1888, by Gerald McCarthy. Distinguished from 
