DESCRIPTION OF SPECIES— ANACAKDIACE^. 293 



R Ii II s p s c II d o - ITI c I' ■ a 11 i , sp. uov. 



Plate LVIII, Fig. 11. 



Le;ive» piiiuately divided; leaflets obloDg, gradually and slightly eolarged from the narrowed 

 base to above the middle, dentate ujiward ; lateral nerves very oblique, straight, subcamptodrome, con- 

 nected with the teeth by nervilles. 



By its shape and size, this leaflet is like those of i?. Meriani, Heer (Fl. 

 Tert. Helv., p. 82, pi. cxxvi, figs. 6-11). It is, however, dentate only near the 

 point, and the nervation is not truly craspedodrome, the lateral nerves curving- 

 along the borders being connected with the teeth by nervilles. In the upper 

 part of some of the leaflets represented by Heer (figs. 6 and 8, loc. cit.), the 

 nervation seems of the same character, and in fig. 9, whicli resembles ours 

 more than any other, the lower lateral nerves are truly camptodrome in the 

 lower part, where the borders are entire, and in the upper part, at least on one 

 side of the leaflets, the arches are connected with the teeth by nervilles. As 

 I have for comparison the only specimen figured, it is not advisable to admit 

 specific identity from a casual affinity which looks like a diversion of the 

 general character. In this species, the secondary nerves, on an acute angle 

 of divergence of 20° to 25°, are more distant in the lower part of the leaflet, 

 very close toward or within the acumen. The substance is rather thick, 

 membranaceous or subcoriaceous. 



Habitat. — Black Buttes, Wyoming; above the main coal. 



lEiiiis rosae folia, Lesqx. 

 Plato XLII, Figs. 7-9. 

 Weinmannia roscefolia, Lesqx., Annual Report, 1673, p. 415. 



Leaf compound, imparipiuuate, with three to four pairs of small, narrowly elliptical leaflets, 

 obtusely pointed, rounded in narrowing to the sessile base, obscurely serrate in the upper part or entire; 

 medial nerves thick, half-round; lateral nerves and areolation obsolete; rachis narrowly margined. 



The dentation of the leaflets is not very distinct; some detached ones, 

 apparently the lower, seen upon the same specimens, are smaller, and have 

 the borders very entire (figs. 8 and 9). I referred this leaf to Wein?nannia 

 on account of the likeness of these remains to living species of this genus 

 figured in £tt. Fl. v. Bil., i, pi. xxiii, figs. B, C Count Saporta considers 

 it as probably representing a species of Rhus, and I am the more disposed 

 to admit his opinion, because remains of R/iits abound in the Upper 

 Miocene flora of the Parks, where this plant lias been found, while none 

 of the central and tropical vegetable types have been recognized there. 

 Indeed, the presence of species of Weinfnannia, a genus especially dis- 



