FLORA OF THE GREEN RIVER GROUP. 101 



identification of the American specimens with Ludwig's species is legiti- 

 mate. 



Hob. — Florissant. Princeton Museum, No. 712 (nut). 



CARYA, Nutt. 



Carya b i 1 i n i c a , Ung. 



Plate XXXIX, Figs. 1,2,13. 



Ung., "Syllog.," p. 39, pi. xvii, figs. 1-10; "Fl. v. Kunii.," p. C>4, pi. xiv, fig. 13; £t., " Bil. FL," iii, p. 46, pi. li, 

 figs. 4-6, 13, 15; Hi, figs. 3, 4, 7-11. 



Leaves odd-pinnate; leaflets sliort-petioled, oblong or narrowly ovate, lanceolate, 

 acuminate, serrate; lateral nerves camptodronie, parallel. 



These fine leaves correspond to the description and figures given of 

 the species by European authors; the borders of the leaves are more or 

 less distinctly serrulate, as shown in fig. 2; fig. 13 shows a variety repre- 

 sented also by the specimens of Mr. Lacoe, which might, perhaps, be 

 separated into a different species, but except the smaller size of the long- 

 acuminate leaflets, the characters are the same. 



Hal. — Florissant; not rare. U. S. Geol. Expl. Dr. F. V. Hayden. 

 Lacoe's Collection, No. 40, in leaves still smaller than fig. 1. 



Carya rostrata, (Goepp.'), Schp. 

 Plate XXXIX, Fig. 4. 

 Ludw., "Palseontogr.," viii, p. 136, pi. lv, figs. 5-7. 



I refer this nut to the species of Ludwig described as quoted above. 

 As we have only on the Florissant shale the representative of a drupe or 

 of the husk, its reference to the European species known by fruits and 

 leaves is not more ascertainable than that of the preceding. 



Hab. — Florissant. Princeton Museum, No. 711. 



Carya Bruckma n n i ?, Heer. 

 Plate XXXIX, Fig. 6. 

 Heer, "Fl. Ter. Helv.," iii, p. 93, pi. cxxvii, fig. 52. 



Fruits small, oval, constricted into au obtuse apex, costate. 

 The fruit is still smaller than that in Heer, loc. tit., and as the inside 

 of the nut only is shown upon the face of the specimen it is not possible 



