DESCRIPTION OF MIOCENE SPECIES OF CALIFORNIA 



AND OREGON. 



EQUISETACE^. 



EQUISETUM, Linn. 



Equisctum species. 

 Plate L, Fig. 8. 



A small fragment of Equisetum, representing a cross-section of a root 

 with rootlets diverging starlike. 



Hah. — Corral Hollow, San Joaquin County, California. 



Equisetum species. 

 Plate L, Fig. 7. 



Part of stem of Equisetum, undeterminable species, related to E. 

 wyomingense, Lesqx., "U. S. Geol. Rep.," vol. vii, p. 69, pi. vi, figs. 8-11. 

 Hah. — Contra Costa, California. 



FILICES. 



LASTREA, Gresl. 

 l<astrea (Goniopteris) Fischeri, Heer. 

 Plate L, Figs. 1, la. 

 Heer, " Fl. Tert. Helv.," i, p. 34, pi. ix, fig. 3. 



Frond pinnate; lower pinnae opposite, piunately partite, the upper alternate, 

 linear, pinnatifid ; pinnules narrower in the upper half, contracted to a blunt apex ; 

 lateral veins curved inside, 7-9 pairs. 



There are of this species merely fragments of the ultimate pinnae ; the 

 description of the frond and their divisions is taken from Heer, /. c. The 

 form of the pinnules contracted above to an obtuse point, the direction of 

 the lateral nerves and their number suffice for identification. 



Hah. — John Day Valley, Oregon. 



239 



