148 MESOZOIC FLORAS OF UNITED STATES. 



REPORT ON THE VARIOUS COLLECTIONS DESCRIBED ABOVE. 



By Wm. M. Fontaine. 



1. PLANTS FROM CUBRT COUNTY, OREO. 



Mr. J. S. Diller collected 17 specimens of fossil plants from the 

 Forks of Elk River, in the Port Orford quadrangle, Curry County, Oreg. 

 The horizon is given as Jurassic or Lower Cretaceous. The plant mate- 

 rial is very poorly preserved. Most of it is not determinable. All of 

 it is in the form of small fragments, which have apparently been floated 

 some distance from the place of growth. Hence the determination of 

 all the fragments can not be positive. The following specimens are the 

 onh^ ones that possess character deserving notice. 



DiCKSONiA OEEGONENsis Foiitaine ?." 

 PI. XXXVIII, Figs. 1, 2. 



One of the rock specimens from Cuny County contains a small 

 fragment of a fern that resembles Dicksonia oregonensis Font., of ,the 

 Buck Mountain Jurassic beds. The specimen is a small fragment of 

 the end of an ultimate pinna. This fragment contains several fructified 

 pinnules. The sori are large and globose in form. The}^ strongh^ suggest 

 the identity of the plant with D. oregonensis. The latter and Cladophlebis 

 vaccensis are not uncommon in the Jurassic strata occurring in the 

 vicinit}^ of Buck Mountain in Douglas County, Oreg., and have been 

 described in this paper. Owing to the small amount of material from the 

 Curry County l^eds the identification can not be positively made. 



The specimen is shown natural size in PI. XXXVIII, Fig. 1, and 

 enlarged in Fig. 2. 



Thyesopteeis ]\Iureayana (Brongniart) Heer?* 

 PI. XXXVIII, Figs. 3, 4. 



On one of the specimens there occurs a small bit of a fern that 

 resembles Thyrsopteris Murrayana. It is a part of the termination of an 

 ultimate pinna, and carries several pretty well preserved pinnules. The 

 form, texture, and nervation of these pinnules indicate stronglj' the 

 presence of T. Murrayana. But this part of a fern frond is not well 



« For the description of this species see pp. 55-56. — L. F. W. 

 ^ For the synonymy of this species see pp. 61-62. — L. F. W. 



