DESCRIPTION OF SPECIES— CUPDLIFER^. 151 



The two specimens referred 1o this species are very imperfect. One 

 (fig. 5), with coriaceous texture, smoolh surface, gradually narrowed down- 

 ward, has, however, the characters of this species, especially as marked by Heer 

 {Joe. cit., figs. 3, 4). The secondary veins are close, open, on an angle of 

 divergence of 60°, with shorter intermediate tertiary veins. The fragment 

 represented in fig. 4 is less distinctly identified with this species by the coria- 

 ceous substance of the leaf, its open veins nearly at right angle to the thick 

 midrib, toward the base, and more evidently branching near the border. 



Habitat. — Near Florissant, west of Pike's Peak, Colorado {Dr. A. C. 

 Peak), specimen represented in fig. 4. Raton Mountains, New Mexico {Dr. 

 F. V. Haijden), specimen represented in fig. 5. 



Querciis straiuinea, Lesqz. 

 riate XIX, Figs. 6,7. 

 Qutrcim siraminea, Lesqx., Annual Report, 1872, ]>. ,373. 



Leaves variable in size, broadly ovate, obtusely pointed, ronnded downward, or narrowed to a 

 short petiole; secondary veins parallel, on an open angle of divergence, camptodrome. 



These leaves seem to represent two different species. They have, how- 

 ever, a common character, that of the yellowish, shining, secondary veins, 

 which I have not seen on any other species of fossil plants of this locality. 

 The leaf in fig. 6 is smaller, with the secondary veins at a more acute angle 

 of divergence; it has, however, the same character of nervation, shorter 

 intermediate tertiary veins, and more or less distinct veinlets, oblique to the 

 secondary veins. In both leaves, also, tlie basilar veins are marginal, and 

 ascend to the branches of the secondary nerves above. This species is dis- 

 tantly related by its nervation to Quercus Des/ocsi, Heer (Fl. Tert. Helv.), as 

 represented in pi. Ixxviii, fig. 7, a species which shows in different fragments 

 (figs. 6 and 14) a marked diversity in the size of the leaves and in the 

 angle of divergence of the secondary veins. 



Habitat. — Golden, Colorado. 



Quercus ciilorophylla, Ung. 



Plate XXI, Fig. 3. 



Quercus thlorophylla, Ung., Cblor. Protog., p. Ill, pi. xxxi, lig. 1.— Heer, Fl. Tert. Helv., ii, p. 47, pi. 

 Ixxv, figs. 3-9.— Massal., Fl. Foss. Senog., pi. xxx, fig. 4.— Sism., Mater., p. 41, pi. ix, fig. 

 5.— Lesqx., Trans. Amer. Phil. Soc, xiii, p. 41t), pi. xvii, figs. 5-7; Annual Report, 1869, p. 

 196; Supplement to Annual Report, 1871, p. 14; Annual Report, 1872, pp. 383, 407. 



Leaves coriaceous, ovate, obtuse, rounded in narrowing to a short petiole; borders entire, undu- 

 late, apparently recurved; secondary veins thin, obsolete, camptodrome. 



Though a number of fragments referable to this species have been found, 

 none represent a full leaf, and the more complete specimen is here figured. 



