Juglans. TEREBIXTHIXE.E. 35 



Juglans Oregoniana, sp. nov. 



PL IX. Fig. 10. 



Leaflet large, linear-oblong, slightly enlarged upwards; borders minutely crenate ; ner- 

 vation camptodrome. 



This fine leaf is apparently very long, and probably abruptly pointed 

 (the point is broken). Its borders are minutely crenate, its secondary 

 nerves close, open, at a right angle of divergence toward the base, curved 

 in traversing the areas, following close to the borders in simple festoons, 

 and mostly simple or without branches, connected only by strong ner- 

 villes in right angle. The affinity of this species to Juglans nigella, Heer, 

 of the Alaska Flora (p. 38, PI. IX. Figs. 2-4), is very close, the difference 

 being merely in the more open lateral nerves toward the base of the 

 leaves, and in the minute obtuse denticulation of the borders, the leaves 

 from Alaska being sharply more coarsely serrate. The nervation, espe- 

 cially the distribution of the basilar nerves, is that of the present J. nigra, 

 Linn., which, however, has always some of its veins branching, and the 

 border teeth larger and more distant. The linear form of the leaves is 

 comparable to that of Juglans rupestris, Engelm. 



Habitat. — On soft laminated clay with AraMa Whitnct/i, evidently of 

 the same age as the Chalk Bluffs of California, without definite locality 

 but Oregon. Voy's Collection. 



Juglans laurinea, sp. nov. 

 PL IX. Fig. 11. 



Leaflet oval, narrowed upwards to a blunt point, gradually narrowed in a curve to t/ie 



unequilateral base; borders sharply distinctly serrate; nervation camptodrome. 



The borders of this leaf are more distinctly serrate than in the former 

 species; the nervation is also of a different and peculiar type, the basilar 

 veins at an acute angle of divergence, about 30°, ascending from the thick 

 midrib high up, at a distance from the borders, and anastomosing in curves 

 to the first pair of secondary nerves above, which are open, more than 50°, 

 and parallel to the following pairs up to the top. This nervation, which 

 resembles that of some leaves of the Laurinece ; Lanrus, Tetranikera, is also 

 remarked in Juglans Baltica, Heer, a Miocene species which, however, greatly 

 differs by entire borders, and the disposition of the upper veins of the 



