384 J. S. DILLER THE JURASSIC FLORA OF OREGON 



the Horsetown rests unconformably upon the Paleozoic rocks and Knos- 

 viile is absent. 



Plaxt Beds of AVESTERisr Side of Sacramento Valley, Californl^ 



FLORA 



One-third of a mile Avest of Wilcox's house, 4 miles south of Lowrj', 

 in Tehama county, Storrs collected, in October last, a few specimens, 

 among which Knowlton recognized — 



"NUsoiiia parL'ula (Heer) Fout. 

 Twniopterls vittata Brongu. 

 Cl'io iphlehis sp. ? 

 Sagenopteris sp ? 



"The material from this locality is all very fragmentary and the identifica- 

 tions of the two species given above are based on very small pieces that are 

 really too minute to be so used, but to the best of my knowledge and belief they 

 are correctly referred. This being the case, this locality is regarded as being 

 Jurassv." 



The occurrence of the "Jurassic flora of Oregon" with a Knoxville 

 fauna at Elk river and Big Bar led to the expectation of finding it in the- 

 Knoxville beds near the base of the Coast range, along the western side 

 of the Sacramento valley, in California. 



In collections made from the Knoxville beds in that region in the fall 

 of 1907 by Mr Storrs, Doctor Knowlton determined with doubt, as noted 

 above, several forms as belonging to the "Jurassic flora of Oregon," but 

 later collections from the same place removed all doubts. All the forms 

 yet found in that region belong to the LoAver Cretaceous (Shasta) flora 

 of Ward and Fontaine. The collections were examined by Doctor Knowl- 

 ton, who reports as follows : 



"Report on fossil Plants collected for J. 8. Dillcr hy James Storrs. Fchruary, 

 1008, on the western Side of the Sacramento Valley, Tehama County, Cali- 

 fornia, iy F. H. Knowlton. 



"No. 30. South fork of Cottonwood creek, 2 miles south of Stephenson's place 

 and % mile west of that point. 

 Cladophlehis falcata Font. 

 Cladophlehis parva ?Font. 

 Sagenopteris oregonensis (Font.) Font. 

 Sagenopteris elliptica ? Font. 

 Angiopteridiiim strictinerve Font. 

 Nageiopsis longifolia ? Font. 

 Zamites tenuinervis Font. 



