22 FOSSIL FLORA OF THE JOHN DAY lUSIN, OREGON. [bull. 204. 



No. SGoi) has the frond from 4.5 cm. to nearly 5 em. in width, while 

 a specimen obtained by the University of California (No. 170, coun- 

 terpart 171) is only 2.5 cm. in Avidth. These measurements are larger 

 and smaller respectiv^el}" than the usual examples of A. .suhs implex 

 from Colorado, and the nervation arises at a less angle in the Oregon 

 specimen, but these differences are slight and probably not sufficient 

 to exclude them from this species. 



Locality. — Cherry Creek, Crook County, Oregon. Collected by 

 Maj. Charles E. Bendire (U. S. Nat. Mus., No. 2634), by Merriam's 

 party in 19(»<) (Mus. Univ. Cal., Nos. 170, 174), and ])y Knowlton and 

 Merriam, lUOl (U. S. Nat. Mus., Nos. 9068-9074). 



Pteris rsEUDO-piNN^FORMis? Lcsq. 



Pteris pseudo-pinn.eformis Lesq., Tert. Fl., p. 52, PI. IV, figs. 8, 4, 1878. 

 Pteris pinna'formiK Heer. Newberry, Later Extinct Floras, p. 7, PI. XLVIII, fig. 5, 

 1898. 



This species appears to have been found but once. The specimen 

 is now in the United States National Museum and is preserved in 

 matrix which closely resembles that at Cherry Creek. 



Locality. — Currant Creek, Oregon. Collected by Rev. Thomas 

 Condon (U. S. Nat. Mu3., No. 8098). 



Lastrea (GoNioPTERis) FiscHERi? Hccr. 



Lastrea (Goniopteris) Fischeri Heer, Fl. Tert. Helv., Vol. I, p. 34; PI. IX, figs. 



3a-3e, 1855; Newberry, Later Extinct Floras, p. 10, PI. XLVIII, fig. 0, 1898. 

 LaMrea Knightinna Newb., Proc. U. S. Nat. Mus., Vol. V, p. 503, 1883. 



The specimen upon which this determination was l)ased is in the 

 United States National Museum, and so far as known no others have 

 since been obtained. 



Locality. — Currant Creek, Oregon. Collected by Kev. Thomas 

 Condon (U. S. Nat. Mus., No. 7097). 



Family EQUISETACE^E. 

 Equisetum oregonense Newl). 



Equisetum oregonense Newb., Proc. U. S. Nat. Mus., Vol. V, p. 503, 1883; Later 



Extinct Floras, p. 14, PI. LXV, fig. 7, 1898. 

 Equisetum Hornii hesq. , Proc. U. S. Nat. Mus., Vol. XI, p. 23, 1888. 



After a careful examination of the forty or more specimens of 

 Lesquereux's Li. LLornii I am convinced that they are the same as 

 Newberry's E. oregonense. They are better preserved than New- 

 berry's material, many of them not being compressed in the least. 

 Two or three flat specimens have a width of fully 3 cm., and the non- 

 compressed examples range from 1.25 cm. to over 1.5 cm. in diameter. 

 Several of the diaphragms are preserved without distortion. They 

 are from 1.25 to 2 cm. in diameter and evidently several millimeters 



