MIOCENE FLOEA— CALIFORNIA AND OREGON. 243 



ALNUS, Toum. 



Alnus Corralliiia, sp. nov. 



Plate LI, Figs. 1-3. 



Leaves oblong-ovate, tbickisb, rounded in narrowing to a sbort petiole, obtusely 

 poiuted, doubly denticulate; teetb sbort, acute, turned outside, glandulose; secondary 

 nerves close, parallel, straigbt to tbe borders, branching in the upper part; nervilles 

 distinct, close, simple, rarely branching, at right angles to the veius ; catkins oval- 

 oblong, with a thick pedicel. 



The leaves, 4 to 6 centimeters long, 2^ to 3^ centimeters broad, short- 

 petioled, have no distinct affinity to those of any fossil species of this genus, 

 but a very close one to those of the living A. viridis — the Mountain Alder 

 of the Eastern slope of the United States. 



Hah. — Specimen fig. 1 is from John Day Valley, Oregon; fig. 2 is 

 from Corral Hollow, San Joaquin County, California. 



Alnus carplnbides, sp. nov. 

 Plate L, Fig. 11; LI, Figs. 4, 4a, 5. 



Leaves large, ovate-lanceolate, acuminate, rounded toward the base and abruptly 

 curved outside in reaching the petiole, triplideutate; lateral nerves parallel, straight, 

 nearly simple ; nervilles simple or anastomosing in the middle, flexuous at right angles 

 to the nerves. 



The leaves much resemble those of Carpinus grandis, Ung., a common 

 species of the Miocene described above from the Green River Group; but 

 cones of Alnus were found in connection with these leaves, which, more- 

 over, differ from Carpinus grandis by the form of the leaves, which are more 

 enlarged at and below the middle, curving outward in reaching the petiole, 

 not rounded or subcordate as in that species, and by the more distant 

 secondary nerves, the distinct nervilles and the large more acute teeth of 

 the borders. By this last character these leaves are related to Alnus 

 macrophylla, Goepp., "Schoss. FL," p. 12, pi. v, fig 1. 



Hob. — Bridge Creek, Oregon. 



