330 B. N. A. BOUNDARY COMMISSION. 
Dicotyledones. 

Porttus Ricuarpsoni—Heer, Porcupine Creek.—This fine species of Poplar, des- 
cribed by Heer from Mackenzie River and Greenland, is represented by a few 
fragments only in these collections. 
Sauix Ragana? Heer, Great Valley —This species occurs at Mackenzie River 
and in Greenland. A few leaves appear referable to it but not with certainty. 
CoryLus rostrata—Ait.—Leaves not distinguishable from those of the common 
beaked Hazel, occur at Porcupine Creek, This species is also recorded by Newberry 
from the Fort Union Gr oup. 
C. Americana.—Walt., Porcupine Creek.—This also is a recent species and is cre- 
dited by both Newberry and Le ‘squereux to the Fort Union Group. Thus both our 
American Hazels occur in these deposits; and a still finer species, C. MacQuarrii, 
Heer, is found at Mackenzie River and in the Fort Union beds. 
PLATANUS HETEROPHYLLUS, Newberry.—Wood End, loose, but no doubt, from the 
Lignite Tertiary formation. The species is found in ‘the Fort Union group. 
Diospyros, sp.—To this genus I refer a few imperfect leaves from Porcupine 
Creek, but cannot certainly identify them with any of the species described from 
other parts of these formations. 
Sapinpus AFFinis, Newberry—Bad Lands, Woody Mountain. This species 1s 
found also in the Fort Union Beds. 
Rxaamnvs, sp.—Great Valley, 345 mile point. A single leaf, wanting part of the 
tip and base, but otherwise very perfect. It corresponds, as far as preserved, with R. 
Eridani of Unger, which occurs in Greenland, but it may be one of the species des- 
cribed by Lesquereux from the Lignite Tertiary of the United States. 
RHAMNUS ConcINNUS.—, Newberry.—Porcupine Creek. This species also occurs in 
the Fort Union group. 
CaryA ANTIQUORUM.—Newberry, Porcupine Creek.—This species is also found in 
the Fort Union group. 
JUGLANS CINEREA? Porcupine Creek-—A leaf so near this species that I hesitate 
to separate it. It resembles, however, J. bilinica Ung. 
VisuRNUM PUBESCENS—Pursh, Porcupine Creek—Kither this species or a large leaf 
of V. lanceolata, Newberry, from Fort Union Group. 
Other leaves in this collection may represent a species of Prunus, a Thalictrum 
different from our modern American species, and several other plants, but not deter- 
minable without more material. 
AgscuLus Antiguus, N.S. (Figs. 8 and 9.)—Pericarp 1} inches in length and 1 inch 
in breadth ; obovate, truncate at base, regularly rounded above, with several strong 
woody spines on the upper half. Seed of similar form but smooth or with a few 
tortuous impressions. Bad Lands west of Woody Mountain, This fruit is almost 
certainly an Aesculus, but with characters inter mediate in some respects between the 
Horse Chesnut and the American Buck- -eye. 
TrapaA Boreauis ?—Heer, (Fig. 10.)\—A few obscure prints seem to indicate a 
species of this genus, which may be identical with the above species described by 
Heer from Alaska, They are associated with stems and linear submerged leaves which 
may have belonged to this plant, and similar to those described by Heer from Alaska. 
In one of my specime ns, the two lateral tubercles seen in Heer’s figures seem to be 
produced into spines, making six in all. The specimens are from Bad Lands, west of 
Woody Mountain, and there is an obscure example of the same form from Great 
Valley. 
Carpo.itues, sp.—An ovate fruit of the form and size of C. lunatus, of Newberry, 
but not distinctly striated. Bad Lands, west of Woody Mt. 
The following are the species catalogued by Heer, from Richardson’s collections 
on the Mackenzie. As they belong to this region, they are given here for compa- 
rison :— 
