FLORA OF THE GEEEN RIVER GROUP. 193 



nerves, at an angle of divergence of about 40°, pass toward tlie borders, 

 slightlY curved and obliquely branching, especially near the borders; the 

 nervines are mostly at right angles to the midrib. Except that the petiole 

 of the leaves is longer, nearly 2 centimeters, and the leaves slightly more 

 enlarged in the middle, the species is, in all its characters, identica with 

 RhusfaK^ocoUnns, Sap., "Et.," ii, p. 352, pi. xii, fig. 6, closely alhed to the 

 well-known B. Cotinus, Linn. 



ir«6.— Florissant. Princeton Museum, Nos. 783 and 87o. 



Rhus coriarioidcs, sp. nov, 

 Plate XLI, Fig. 3. 



Leaves odd-pinnate; leaflets narrowly lanceolate, gradually acuminate, narrowed 

 in roS to tie base', sessile; borders distantly serrate; lateral nerves curved, 

 craspedodrome. 



The leaflets are opposite, at least in the upper part of the leaves, 6i 

 centimeters long, 10 to 12 millimeters broad toward the base; the teeth 

 are short, turned upward, gradually smaller toward the apex, where the 

 borders are entire as near the base. The affinity of this spectes is with 

 BMsglalra, Linn., of the present North American Flora, and especially 

 with fhe European R. coriaria, Linn., which merely differs by the larger 



teeth of the borders. 



i^«6._Florissant. Princeton Museum, No. 858. 



Rlius cassioides, sp. nov. 



Plate XLI. Fig. 11. 



the borders, craspedodrome. „ , ^ ^ 



The specimen does not indicate ,vhelher the three leaflets figured 

 pertain to an odd-pinnate leaf or to a trifoliate one, the axis or pedice 

 ling broken under the point of attachment of the leaflets The termina 

 „ne?s 2! centimeters long, 13 millimeters broad above the midd e, the 

 lateral 14 to 1.5 millimeters long and 6 millimeters broad; the lateral veins 

 iite distinct, follow dose to the borders in iheir cnrves and are unit d 

 by close nervines at right angles, simple or anastomosing in the middle. 



CF 13 



