34 FOSSIL FLORA OF THE SIERRA NEVADA. 
under this name, but not described in the Prodromus. The relation is 
rather in the size and form of the leaflets than in the nervation, which 
in the Brazilian plant is analogous to that of Rhus metopium, but with a 
punctate areolation. In the fossil floras our species is distantly compar- 
able to Z. mtegrifolium, Heer, Fl. Tert. Helv., II. p. 86, Pl. CXXVII. 
Figs. 27-30. 
Halntat.— Bowen’s Claim, Oregon, in connection with Quercus Boweniana, 
and fragments of Acer vitifolium. Voy’s Collection. 
JUGLANS, Linn. 
Juglans Californica, sp. nov. 
Pl. IX. Fig. 14. PL X. Figs. 2, 3. 
Leaves large, entire, oblong-oval, obtuse, narrowed or rounded to the base ; secondary 
veins numerous, inequidistant, on an open angle of divergence, camptodrome. 
Nothing more can be observed of these leaves than is represented by 
the figures. They are referable to the Juglans of the type of J. regia, 
Linn., so widely known in cultivation, and spontaneous only in Asia. 
We do not have it in America, where even by cultivation it fails to 
give evidence of prosperity. As the type is extremely common in the 
Miocene of Europe, where it is represented by numerous species, some 
of them varieties of the most common one, J. acuminata, Al. Br., and as 
we have the same species also common in the North American Tertiary, 
the fossil form of the California Chalk Bluffs may be considered as prob- 
ably the last representative of this type upon the North American Con- 
tinent. In the different appearances of its leaves, their form, their open 
nervation, their shape, this species is related to J. acuminata var. latifoha, 
Heer, Flor. Tert. Helv., HI. p. 88, Pl. CXXIX. Figs. 2-8. They are 
generally narrower, more evidently broadly obtuse or taper pointed, rather 
than abruptly acuminate. It is the only difference. The great variety 
of the leaflets of the same species of Juglans may render advisable the 
reference of these of the Californian Pliocene to Heer’s species. 
Habitat. —Chalk Bluffs, Nevada County, California. Voy’s Collection. 
