Report on a small Collection of fossil Plants from the Vicinity of 
Porcupine Butte, Montana * 
By F. H. KNow.tron 
(WitH PLATE 26) 
The following report is based on a small collection of fossil 
_ plants made by Mr. Walter Harvey Weed, of the U. S. Geological 
Survey, in July, 1892. They come from the sandstone series 
above the bend of the Sweet Grass, west of Porcupine Butte, Mon- 
tana, and embrace about twenty pieces of matrix. Only the four 
following species of plants have been determined, although’ there 
are fragments of stems, apparently of grasses, and others of dicoty- 
ledonous leaves. 
GLYPTosTRObBUS EuroparEus UNGER Heer 
Glyptostrobus Europaeus Ungeri Heer, Fl. Tert. Helv., 3: 159. 
1859; Lesquereux, Cret. & Tert. Fl., 222. p/. 26. f. r-7°. 1883. 
The collection contains a number of small fragments that with 
_ very little doubt belong to this form as described and figured by 
Lesquereux. It is probably the same as that identified by New- 
berry as G. Europaeus Unger, in his Later extinct Floras of North 
America (24. pl. 26. f. 6-8), but, as I have stated in another place 
(Catalogue of the Cret. & Tert. Pl. of N. A., 113), much con- 
fusion still exists regarding the status of these forms, which can 
. only be settled by an adequate series of well-preserved specimens. 
ONOCLEA SENSIBILIS FossiLis Newb. (/%. 26) 
Onoclea sensibilis fossilis Newb., Ann. N. Y. Lyc. Nat. Hist., 
9: 39. Ap. 1868; Lesquereux, Ill. Cret. & Tert. Plants, p/. 8. f. 
I-9,; f. 1-5. 1878; Newberry, Later extinct Floras, 8. p/. 23. 
wes od, 7. iF. 1898. 
This form was first described by Newberry in 1868, from ma- 
terial obtained by Dr. F. V.-Hayden, near the mouth of the Yel- 
lowstone River, in Montana, in what are now known as the Fort 
Union beds. It has since been collected in approximately the 
same locality, and also along the North Saskatchewan, in beds of 
* Published by permission of the Director of the U. S. Geological Survey. 
705 
