DESCRIPTION OF SPECIES— J UGLANDE^.. 289 



Juglans dcnticiilata, Heer. 



Plate LVIII, Fig. 1. 



Juglans deniiculaia, Heer, Fl. Foss. Arct., ii, p. 483, pi. Ivi, figs. 6-9. — Lesqx., Annaal Report, 1871, p. 

 ai)8; Supplement, p. 8; Annual Report, 1872, pp. 389, 408. 



Leaves long, lanceolate, narrowed to a point, and denticulate npward; either rounded to the 

 petiole, or gradually attenuated to it. 



The leaves of this species vary so widely that none of the descriptions 

 made in the different reports, and from specimens received at different times, 

 are alike. As in the figures given by Heer (Jqc. cit.), some of our specimens 

 represent small leaves rounded to the petiole, with lateral veins generally 

 open; others have the base more or less narrowly cuneate and the veins 

 more oblique. Fig. 1 of this plate represents the best specimen which I 

 have had for examination. It differs from most of the Greenland leaves by 

 the lateral veins being more open, but not more so than in fig. fi of Heer. 

 A persistent character is the dentation of the borders toward the point of 

 the leaflets; it is generally more or less discernible. The upper lateral veins 

 also are connected with the point of the teeth by distinct nervilles from 

 the back of the festoons, and the base of the leaflets is generally entire. 

 Prof Heer, comparing his species to Juglans bilinica, remarks, that the 

 arches of the secondary veins run nearer to the borders, a character which 

 is seen upon all the fragments which I have referred to this species. 



Habitat. — Green River, Wyoming, above tish-beds; six miles above 

 Spring Canon, Montana (Dr. F. V. Hayden). Carbon, above the main coal; 

 not frequent, and generally in fragments. 



CARYA, Nutt. 



Carya antiquoruin, Newby. 



Plate LVII, Figs. 1-5 ; Plate LVIII, Fig. 2. 



Carya aniiquorum, Newby., Notes on the Later Extinct Floras of North America, p. 72. — Lesqx., Annual 

 Report, 1871, p. 294; 1872, p. 402. 



Leaflets large, broadly oval or ovate-lanceolate, acuminate, rounded or broadly cuneate to the 

 petiole; base inequilateral; borders minutely denticulate; lateral nerves close, parallel, simple, curved 

 in ascending toward the borders. 



The leaflets of this species are very large, except those of the lowest 

 pair, whose size is, as in species of Juglans, generally diminutive ; part of 

 fig. 3 and fig. 5 represent them. The largest, in the upper part of fig. 1, is 

 more than nine centimeters long below the middle, and its length could not 

 have been less than twenty centimeters. Fragmentary specimens in Dr. F. 

 19 T F 



