200 DESCRIPTION OF SPECIES. 



LEGUMINOS^E. 



CYTISUS, Linn. 



Cytisiis inodestiis, sp. nov. 



Plate XXXIX, Figs. 9, 10, 11. 



Leaves trifoliate ; leaflets sessile, ovate-lanceolate, acute, borders entire; secondary 

 nerves camptodrome. 



The small leaves, with leaflets 2 to 3 centimeters long, 5 to 8 milli- 

 meter.s broad, have the nervation mostly obsolete. I do not find them 

 related to any fossil species published. Fig. 9 appears to have the borders 

 serrulate, but that is probably caused by maceration and erosion. It has 

 the same characters. 



iTaJ.— Florissant. U. S. Geol. Expl. Dr. F. V. Hay den. 



Cytisus Florissantianus, sp. nov. 



Plate XXXIX, Fig. 14. 



Leaf loug-petioled ; leaflets entire, ovate-lanceolate, the middle short-pedicellate, 

 the lateral sessile, nnequilateral at base; nervation camptodrome. 



The leaflets appear acuminate, but the point is broken; they are 

 rounded in narrowing to the base, and the borders are entire, only slightly 

 undulate. This species is scarcely different from C. Freybergensis, Ung., 

 "Syllog.." ii, p. 19, pi. iv, fig. 2, from which it merely differs by the leaflets 

 being a little longer and narrower. The nervation is of the same type, 

 and if the leaflets of the American leaf are obtuse the species should be 

 considered as identical. 



^a*.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



DALBERGL&, Linn. fll. 

 Dalberjfia cuueifolia, Heer. 

 Platf XXXIV, Figs. 6,7. 

 Heer, '■ Fl. Tert. Helv.," iii. p 104. pi. cxxxiii, tig. 20. 



Leaves pinnate; leaflets sessile, membranaceous, cuneate to the base, emarginate 

 at the apex ; secondary nerves thin, at an acute angle of divergence. 



The leaves are small, averaging 3 centimeters long, \h broad near the 



middle, from which they are gradually narrowed to the somewhat enlarged 



point of attachment. The lateral nerves are at an acute angle of diverg- 



