Ai 
SEGREGATES OF RHUS. 117 
second of the two Tournefortian species, the one quoted by 
Linneus himself under Æ. Zoxicodendron, of which species 
Miller’s 7. pubescens is meant to be an exact synonym. He was 
unable to perpetrate a duplicate binary name; and I also leave that 
task to whomsoever it may be a welcome one. That the species 
is to be identified with some dwarf plant of the southern sea- 
board (see Small, F1. 727) is a proposition for which I can find 
no warrant. Miller, whose knowledge of these shrubs was far 
more perfect than that of Linneus, says that the present species 
“grows naturally in many parts of North America ;” also that 
itis among the larger kinds. Even Linneus gave it a range 
from Virginia to Canada. 
T. RYDBERGII. Rhus Rydbergiz, Small, in Rydb. Fl. Mont. 
268, in part. Well distinguished by Mr. Small, for the plant 
of Montana, occurring in Wyoming, mountain districts of Colo- 
rado, southward even to New Mexico, apparently, but hardly 
including that of Washington and Oregon. 
T. MacRocaRPUM Apparently low, upright, not very stout, 
the small leaves on slender elongated petioles, all parts wholly 
glabrous: leaflets subequal, small, the terminal one with petio- 
lule more than 4 inch long, the laterals almost subsessile, all 
three of equal size and ovate, either abruptly acute or subtrun- 
cate at base, acute at apex, entire or with a few coarse teeth, the 
largest not exceeding 2 inches long, of a light dull green and a 
firm texture: panicles small and reduced to little more than a 
simple raceme, not erect, the rachis being slender and the fruits, 
though few, the largest in the genus almost exactly globose, the 
epicarp uncommonly thin and fragile, not wrinkled, almost free 
from the usual striæ. 
Known only from extreme Western Kansas well upon the 
arid region of the Rocky Mountain basal plain; the type speci- 
mens in U. S. Herb. from near Syracuse, 11 July, 1893, by C. 
H. Thompson. 
T. Neaunpo. Branches of the season red-brown and hirtel-. 
lous, the older dark-brown, glabrate, closely and minutely len- 
ticellate: leaves very large, the terminal 5 or 6 inches long, 3 
to5in breadth, ovate, abruptly acuminate, with a few coarse 
