706 Know tron: Fosstt PLANTS FROM PORCUPINE BUTTE 
the so-called Canadian upper Laramie, which is of the same age 
as the Fort Union. 
Dr. Newberry based his determination entirely on the sterile 
fronds, and until the present time no fruit appears to have been 
found. This little collection made by Mr. Weed fortunately con- 
tains undoubted specimens of the fertile fronds, thus proving the 
correctness of Dr. Newberry’s identification of the material with 
Onoclea. 
At first thought it hardly seems probable that a form now liv- 
ing could have been in existence in carly Tertiary times, and have 
been so little modified in coming down to us. This view appealed 
strongly to Dr. Newberry, and he sought diligently for characters 
by which to separate them. On this point he speaks as follows : 
‘Varying as the living Oxoclea does, in size, outline, and nervation 
of the sterile frond—from six inches to three feet in height, from 
a finely reticulated to an open dichotomous nervation, from a bi- 
pinnate frond, with remote obovate pinnules, to a pinnate form 
with wave-margined pinnae and broadly alate rachis—it plainly in- 
cludes all the characters of the fossils before us, and I, therefore, 
find it impossible to separate them.’’ Asa matter of fact, about 
the only point of difference lies in the somewhat more robust habit 
of the fossil forms, and this obviously can have but little weight. 
This close similarity is still further emphasized by the fertile 
fronds which are here figured for the first time. The best of 
the several fruiting fragments, shown in PY. 26, f. 7, is quite well 
preserved, and does not exhibit any particular difference from the 
fruit of living examples. It has, as may be seen, a strong rachis 
and the numerous berry-like pinnules arranged along the slender 
branches, exactly as in the living fronds. For the present at least 
it seems impossible to do more than retain it under the above 
name. 
ARALIA NOTATA? Lesq. 
Aralia notata Lesq., Tert. Fl., 237. pl. 39. f. 2-4. 1878. 
The collection contains fragments of two large leaves that 
appear to belong to this species. 
Tilia Weedii sp. nov. 
Leaf large, of firm texture, broadly cordate-ovate or nearly 
orbicular in outline, rounded above (apex not preserved) and 
