DESCEIPTIOX OF SPECIES— JUGLANDELE. 287 



Juglans tlierinalis, Lesqx 

 Plate LVI, Figs. 3, 4. 

 Juglana iheniialis, Lesqs., Supplement to Annual Report, 1871, p. 17. 



Leaves oval-oblong or ovate-lanceolate, pointed or acuminate, ro-iudcd in narrowing to tho 

 petiole ; lateral nerves distant, curved ; fibrillje strong, in right angle to the nerves. 



The nervation of this species is remarkably different from that of the 

 former; the lower lateral nerves being opposite at a distance above the base 

 of the leaves, and at a more acute angle of divergence, simple, all, like the 

 others, connected by strong nervilles, and more or less curved in traversing 

 the lam.ina. The midrib is rather narrow, but rigid; the nervilles coming out 

 of the middle nerves in fig. 3 are as strong as tertiary veins, and as long, 

 anastomosing with the lateral nerves in the middle of the areas, or even near 

 the borders. The shape and nervation of the fragment of fig. 4 differ some- 

 what, the upper part being more gradually tapering or lanceolate, and the 

 nervilles being close and not so strongly marked. The lower lateral nerves 

 are, however, as in fig. 3, on a more acute angle of divergence, and 

 apparently joining the midrib above the base of the leaf. This species is 

 comparable, for the nervation of fig. 3 at least, to J. longifoUa, Heer (Fl. 

 Tert. Helv., pi. cxxix, fig. 10). 



Habitat. — Hot Springs, Middle Park, Colorado; in conglomerate vol- 

 canic deposits {Dr. F. V. Hayden). The specimen represented in fig. 4 was 

 found at Golden, Colorado. 



Juglans Scliinipci'i, Leeq^.- 

 Plate LVI, Figs. 5-10. 



Juglans Schimperi, Lesfix., Supplement to Annual Report, 1871, p. 8 ; Annual Report, 1872, pp. 382, 384. 



Leaves lanceolate, gradually acuminate, broadly cuneate and rounded at the inequilateral b.ase 

 to a j-hort petiole; borders slightly undulate; secondary nerves numerous, parallel, curved, closely fol- 

 lowing the borders; nervilles distinct; areolation subquadrate. 



This fine species is represented by many specimens. Its leaves are 

 generally narrow and long, gradually tapering from above the base into a long 

 acumen, the size varying from eight to fourteen centimeters long, and from 

 two to three and a half centimeters broad in the widest part near the base. 

 The lateral nerves, diverging 40° to 50°, are numerous, eighteen pairs in the 

 largest leaves, parallel, mostly simple, slightly curved in ascending to the 

 middle of the areas, but more and gradually so in nearing the borders, which 

 they closely follow in simple bows. They are connected by close distinct 

 nervilles, generally in right angle. No fossil species of this section is com- 



