387 



21. QUERCUS Haidingeei, Ett. 



Leaf ovate-lanceolate, narrowed to tbe base (point broken); borders 

 obtusely creuato-serrate ; lateral veins numerous, close, on an angle of 

 divergence of forty to forty-five degrees, rarely branching, camptodrome 

 and craspedodrome. The leaf ax)pears to be tapering to a point. It is 

 upon coarse sandstone, and the details of areolation are totally oblit- 

 erated. By its form, the divisions of the borders, and the nervation, it 

 agrees with the characters of the species, except that in this leaf the mid- 

 dle nerve is not thick, as described by Heer. 



Habitat. — Green Eiver, Br. F. V. Hayden. 



22. Planera Ungeri, Ett. 



Leaves short i)etioled, ovate, acuminate, narrowed to the base, simply, 

 coarsely serrate from the middle upward ; secondary veins nine pairs, 

 passing up to the point of the teeth in an acute angle of divergence. This 

 form, though represented by one leaf only, is in entire concordance of 

 characters with those of this species widely distributed in the Miocene of 

 Europe. 



Habitat.— South Park, Capt. Ed. Berthoud. 



23. Ficus ovALis, sp. nov. 



The only leaf representing this species is coriaceous, oval, entire, nar- 

 rowing in a curve to a long thick or flat broad petiole, grooved in the 

 middle penninerve ; lateral veins alternate, camptodrome, curving along 

 the borders in festoons; tertiary veins short; areolation obsolete. The 

 upper part of the leaf is broken. 



Habitat. — Pleasant Park, Plum Creek, Dr. F. V. Rayden. 



24. PiCUS PSEUDO-POPULUS, Sp. IIOV. 



Leaves oval-pointed, narrowed to the petiole, entire, three-nerved from 

 the top of the petiole ; lateral veins at an acute angle of divergence, 

 like the secondary veins, two or three pairs, the lower of which is at a 

 great distance from the primary ones, camptodrome ; nervilles distinct, 

 in right angle to the midrib, crossed by oblique branchlets, forming a 

 large equilateral or polygonal areolation. A remarkable species, 

 resembling a Cinnamomuni by the nervation of its' leaves and n Zi.zyphus 

 hy the form. 



Habitat. — Evanstou, Br. F. V. Rayden. 



25. Ficus Wyomingiana, sp. nov. 



May be a variety of the former, resembling it closely by the form of 

 the entire, long, petioled leaf. The difference is marked, however, by 

 the total absence of secondary veins ; the middle nerve being joined 

 to the lateral ones hj strong nervilles in right angle. 



Habitat. — West of Green River station, Br. F. V. Rayden. 



26. DiOSPYEAS? PICOIDEA, sp. UOV. 



Leaf ovate, narrowed to a point (broken), rounded to the petiole, 

 thickish, entire, pinnately-nerved ; midrib thick, deeply marked, as also 

 the secondary veins, parallel, at an acute angle of divergence, all doubly 

 camptodrome ; fibrillffi thick, nearly in right angle to the veins, divided 

 in the middle ; areolation square or polygonal ; surface rough. The 

 generic relation of these leaves is not satisfactorily fixed. 



Habitat. — Black Butte. 



27. YlBURNUM PLATAKOIDES, Sp. nOV. 



This species essentially differs from Viburnum marginatum by the less 



