knowlton.] DESCRIPTION OF SPECIES. 13 
are broadly elliptical -lanceolate in outline, and range in size from 4 to 
10 cm. in length and from 2 to 3.5 cm. in width. 
It is difficult to settle on the real affinities of these leaves. The fact 
that they are undoubtedly unequal-sided makes it probable that they 
are leaflets of a large compound leaf. Their general shape and nerva- 
tion is similar to that in certain species of Juglans, and I have pro- 
visionally referred them to that genus. They have, for example, quite a 
strong resemblance to certain leaves from the Laramie that have been 
referred by Lesquereux to his Juglans rur/osa. 1 
Habitat. — Eight bank of Missouri River 7 miles below the Coal Banks. 
Collected by Lester F. Ward, August 24, 1883. 
Laurus ? sp. 
PL I, fig. 4. 
This form is represented by the single fragment shown in the figure, 
ivhich is obviously too imperfect to permit certain identification. It is, 
:br example, scarcely distinguishable from Laurus Knowltoni Lx., 2 from 
:he Dakota group of Kansas. It is also somewhat like the upper por- 
tion of Persea Havana from the same place. It is too fragmentary, 
lowever, to permit further generalizations. 
Habitat. — Right bank of Missouri River 7 miles below the Goal Banks. 
Collected by Lester F. Ward, August 24, 1883. 
Liriodendron alattjm Newb., MSS., Hollick. 
PI. I, fig. 6. 
Ariodendron alatum Newb., MSS., Hollick, Bull. Torr. Bot. Club, Vol. XXI, p. 467, 
PI. CCXX (1894). 
The collection from below the Coal Banks contains the single ex- 
ample figured, which is, with little hesitation, referred to the Lirioden- 
Iron alatum of Newberry described from the Laramie of Walsenberg, 
Colorado. It is, unfortunately, not all preserved, lacking the side and 
41 of the apex. It is slightly smaller than the figured specimens, but 
t has the same general shape, the thick midrib and the thick, strong 
>etiole with its characteristic broad wing. The secondaries are alter 
iate or subopposite, as in Newberry's species. The lowest pair are very 
hin and arise at the very base of the leaf at the top of the petiole, 
'he other secondaries are similar, emerging at a low, almost right, 
i ngle, and occasionally forking near the margin. Not enough of the 
margin is preserved to show the nervation, which in L. alatum is dis 
i iuctly carnptodrome by broad arches well inside the margin. Numerous 
i itermediate secondaries are present in Newberry's specimens, but if 
resent they are not preserved in the specimen under consideration. As 
he apex is not preserved, it is impossible to know whether it agrees 
i this particular with the Walsenberg specimens. 
This specimen was at first thought to represent a new species of 
1 Tert. EL, PL LVI, fig. J . * Fl. Dak. Gr., p. 94, PL L, fig. 4. 
