486 EEPOET UNITED STATES GEOLOGICAL SURVEY. 



broad, flat petiole. Their form is either oblong, acuminate or lanceo- 

 late, narrowing to a long acumen. The .primary basilar nerves, one or 

 tuo pairs, are on a more acute angle of divergence than the secondary, 

 passing high up along the borders in successive curves or festoons joined 

 to the lower secondary veins by strong nervilles. The middle vein is 

 thick and flat. This species is allied to Ficus populina, Heer, from which 

 it differs essentially by narrower leaves, rounded to the petiole, and by 

 the ultimate areolation not punctulate; and still more closely related to 

 Quercus Heerii, Sap., Et., 1, 1, p. 87, pi. vii, fig. 3 A, which seems to rep- 

 resent the same species in one of its smaller leaves. The only difference 

 remarked in the American specimens is the broader flat petiole, which 

 rather resembles that of a Ficus, but the form of the leaves, the nerva- 

 tion and areolation, the divisions of the obtusely crenate borders are 

 exactly similar. The French author has found involucres of seeds of 

 Fopulus with his species, and figures, as point of comparison, Populus 

 IcmrifoUa, Ledb., a living species of Siberia, which has about the same 

 character 5 hence the reference of these leaves to this genus seems au- 

 thorized. This species, he says, is extremely rare in the Gypses of Aix. 

 Of Salicc, the collection of Florissant has a number of leaves identified 

 with iS. lavateri, Heer, S. Integra, Al, Br., 8. media., Al. Br., and 8. varians, 

 Goepp. Flatanus, Liquidamhar, Ficus, and all the Laurinece, are mostly 

 absent. Indeed, there are scarcely any coriaceous leaves among the 

 specimens, and none of large size except the Fopulus mentioned above. 

 Fraxinus is represented by three species, one of them, F. Broionellii, 

 described in Flor. Tert., loc. cit. There is no Biospyros, but two or three 

 species of the Ericacece ; one Andromeda, perhaps two ; one Vaccinium ; 

 and in the Araliaceas one leaf only. Of Vitis, Cornus, Magnolia, Nehtm- 

 hium, of the Tiliacece, also there is none. Acer has one species; one leaf 

 only of the type of A. pseudo-campestre, Heer, and fruits still smaller 

 than those of Acer decipiens, Heer, as figured in Fl. Tert. Helv., pi. cxvii, 

 fig. 22. Fer contra, the Sapindacece are very abundant; there are nume- 

 rous specimens of 8. stellaricefolius and 8. angustifolius of the Tert. Flora, 

 pi. xlix, with still two or three other species, and in the Frangulaaw, 

 leaves of 8taphylea, not as well preserved as that already figured, loc. 

 cit., pi. xlviii, a few leaves of Celastrus, and two species of Ilex. The 

 Rhanmece and the Juglandece have not any specimen in the collection, 

 while the Anacardiacew are most abundant in not less than six or seven 

 species of Bims and one of Fistacia. The Rosacece have a, Prunus and 

 species of 8pirea and very finely preserved leaves of an AmelancJiier, 

 which are scarcely distinguishable from some of the varieties of the living- 

 species. This, with a large number of Leguminosce of the genera 

 Colutea, Rohinia, and Cassia, constitutes the more essential part of the 

 specimens as far as I have been able to fix a determination in sorting 

 them for future examination. The flowers, petals, sepals, stamens, and 

 pistils, though not very numerous, are interesting. Flowers of Acer are 

 the only ones which I could recognize at first sight. Of other plants of 

 undetermined relation, there is Trilohium of Uuger. As many speci- 

 mens are obscure, this collection will demand a great deal of work and 

 research for the final determination of the species. 



Professor Scudder has sent with the above, from near Eandolph, Wyo., 

 a small number of very fine, admirably preserved specimens, regrettably 

 too few in number. They represent one Flahellaria, with the petiole trun- 

 cate at the point of union to the rays, narrowly and equally nerved, the rays 

 numerous and narrow, disposed like those of F. Eocenica, Lesqx., Tert. 

 Flora, pi. xiii, fig. 1, but more coarsely nerved, at least for the primary 

 nerves, the intermediate veins being less numerous and scarcely observ-- 



