216 u:nited states geological survey— tertiary flora. 



narrowed to an acumen and downward (o the petiole, and have also ihe 

 secondary veins distant and under the same angle of divergence. These 

 leaves are comparatively smaller, however; their base is more prolonged into 

 a very acute wedge, and, as the details of areolation are totally obsolete, the 

 degree of relation between these forms cannot be positively ascertained. I 

 do not know any leaf of Laurinfa with a midrib of the same thickness. In 

 the present flora, Laurus Canariensis, Web., has the more marked affinity 

 with this fossil species, especially by leaves of the variety glaucescens, one of 

 which is figured by Heer {loc. at). Except that the leaf described here is 

 larger and has not any warts in the axils of the secondary nerves, the charac- 

 ters are much alike. 



Habitat. — Point of Rocks, Wyoming {Dr. F. V. Haydev). 



Laurus IJ t a ii e n s i s , sp. nov. 



Plate XXVI, Fig. 11. 



Leaves ovate, lanceolate-acuminfite, rounded-cuneato f o tlie petiole ; secondary veius at an acute 

 angle of divergence, inequidistaut, parallel. 



A single leaf, subcoriaceous and very entire, with the basilar secondary 

 nerves opposite from a short distance above the base, at an angle of divergence 

 of 25° to 30°, passing up nearly straight to quite near the borders. Except 

 some veinlets in right angle to the nerves, the details of areolation are totally 

 obsolete. By its nervation and its shape, this fine leaf is comparable to those 

 of some living species of Phcsbe, like P triplinervis, Gray, of Cuba, whose 

 leaves, though generally smaller, have sometimes the same size as this one, 

 which measures twenty centimeters in length and three and a half centi- 

 meters in width. The point is broken; but the direction of the borders 

 shows it to be gradually acuminate. I do not find any fossil species evidently 

 related to this. 



Haiutat. — Bridger's Pass, Wyoming; in connection with Araliopsis 

 gracilis and Populus arctica (Dr. F. V. Hai/den). 



Laurus Brossiana, Lesqx. 

 Plato XXXVI, Fig. 9. 

 Persea Brosaiana, Lesqx., Annual Report, 1873, p. 407. 



Leaf aiibcoriaceous, oval-oblong, rounded to a short acumen, cnneato to the petiole; secondary 

 nerves strong, alternate, slightly curved, with small glands at the axils, brachiodronio. 



For representative of this species, we have, as for the former, one leaf 

 only, but it is also in a good state of preservation. Its size is about the same 



