FLORA OF THE GREEN RIVER GROUP. 181 



Acer, species. 



Plate XXXVI, Figs. 7, 8. 



Leaves rounded to the petiole, palmately three-nerved and three-lobate ; borders 

 dentate. 



The leaves are too much broken for determination and definitive 

 description ; they appear related to some of the varieties of Acer trilohatum, 

 Al. Br. 



Hab.-~ Florissant. U. S. Geol. Expl. Dr. F. V. Eaydm. 



SAPINDACE^E. 



SAPINDUS, Linn. 

 "U. S. Geol. Rep.," vii, p. 263. 



Sapindus stellarijefolius, Lesqx. 



Ibid , p. 264, pi. xlix, fig. 1. 



Sapindus angustifolius, Lesqx. 



Plate XXXVII, Figs. 1-8; XXXIX, Fig. 12. 

 Ibid., p. 265, pi. xlix. figs. 2-7. 



The numerous forms figured of this species, common at Florissant, 

 shows the great variety of its leaflets. Though comparatively large, the 

 leaves of pi. xxxix, fig. 12, appear referable to it. The specimens, however, 

 may represent two specific forms, which can be separated only when the 

 nervation is known. 



Sapindus coriaceus, Lesqx. 



" U. S. Geol. Rep.," vii, p. 265, pi. xlix, figs. 12-14. 



Sapindus Dentoni, Lesqx. 

 Ibid., p. 265. pi. lxiv, figs. 2-4. 



Sapindus obtusifolius, Lesqx. 



Ibid., p. 266, pi. xlix, figs. 8-11. 



There is a fine specimen of this species from Florissant in M. Lacoe's 

 cabinet, No. 48. The leaflets are disposed as in fig. 8, /. c, but they are 

 still smaller, the lower lb centimeters, the upper 1 centimeter, all more 

 distinctly obtuse. 



