22 FOSSIL FLORA OF THE SIERRA NEVADA. 



in Fig. 3. The areolation is distinct, composed, by subdivisions of the 

 nervilles, of very small, round, polygonal meshes. The figure given of 

 this species by Heer, in his Mioc. Bait. Fl., p. S'J, PI. XV. Fig. 1 b, repre- 

 sents merely one lobe, whose point is broken, and a narrow obtuse sinus. 

 The characters of nervation, that is, the lower secondary nerves in an 

 acute angle of divergence, somewhat more open for tbe upper ones, as 

 also the border divisions of the leaves, are exactly the same ; the frag- 

 ment is, however, too small for warranting a claim of identification, which, 

 however, receives a degree of evidence from the presence in this flora 

 of a large number of leaves of Populus Zaddachi, a species, as remarked 

 formerly, also abundant in the Miocene Baltic flora. This type of Aralia 

 differs from all the Cretaceous congeners by the cordate base of the 

 leaves. 



Habitat. — Table Mountain, Tuolumne County, California. Voy's Collec- 

 tion. 



Aralia angustiloba, sp. nov. 

 PL V. Figs. 4, 5. 



I. ritrrx of medium sine, coriaceous, very entire, hrouilhj ciuieate to ei short petiole, enlarged 

 upwards, and deeply cut in Jive linear narrow entire lobes ; primary nervation in three 

 from the base, in fee by the forking of the lateral nerves, oil slender and of equal 

 thickness/ secomlary veins open, close, equidistant, parallel, and camptodVome. 



The leaves, of a coarse, rugose, coriaceous texture, are deeply cut in 

 five narrow linear lanceolate? lobes, whose point (broken) seems to be 

 obtuse. They differ from those of the former described species and of 

 other fossil congeners, not merely by the characters of their divisions, 

 but by the close, numerous secondary nerves on a broad angle of diver- 

 gence, 70°. The only species offering some points of analogy to this are 

 both Aralia (Platanns) digitata and A. jatropcefoUa, Ung. Clor. Prot. ; but 

 the first has the lobes much enlarged in the middle, and acuminate; the 

 second has them dentate ; and in both species the five palmately primary 

 nerves are from the top of the petiole. 



Habitat. — Chalk Bluffs, California. Voy's Collection. 



