86 MESOZOIC FLORAS OF UNITED STATES. 



1836. Adiantites irregularis Gopp.: Op. cit., p. 385. 



1838. Oydopteris cuneata (L. & H.) Presl [non (Gopp.) Ung. nee Carr.J" in Stern- 

 berg: Flora der Vorwelt, Vol. II, p. 135. 



1838. Txniopteris Phillipsii (Brongn.) Presl in Sternberg: Op. cit., p. 140. 



1843. Sagenopteris f cuneata (L. & H.) Morr.: Cat. Brit. Foss., p. 20. 



1849. Phylhpteris Phillipsii Brongn.: Tableau, pp. 22, 105. 



1865. Gymnogramme cuneata (L. & H.) Ett.: Farnkrauter der Jetztwelt, p. 70. 



1865. Gymnogramme PhUlipsii (Brongn.) Ett.: Op. cit., p. 71. 



Forms that agree exactly with Sagenopteris jmucifolia are not rare 

 at some of the Oregon Jurassic locahties. ■ The leaves vary a good deal 

 in size but are pretty constant in general shape. They ai'e narrowly ellip- 

 tical, sometimes so narrow in proportion to their length as to be linear- 

 elliptical. They narrow gradually to their bases and tips, so as to be 

 lancet-shaped at the end and wedge-shaped at the base. The narrowing 

 in some bases is more gradual than in others, so as to give the base a pro- 

 longed wedge shape. The nerves are not so closely or so copiously anas- 

 tomosed as in S. Goep-pertiana and are not so fine. The leaves are decid- 

 edly less inequilateral than in that species. Phillips ^ has pointed out that 

 the nerves depicted in the figure of Lindley and Hutton ' are not correctly 

 given. Certainly no such nerves occur in the Oregon plants. The mid- 

 nerve is mord distinctly defined than in S. G(&ppertiana, and is prolonged 

 farther in the leaf. Seward '* described two forms of this plant. One, the 

 form called originally Otopteris cuneata, is not found in the Oregon col- 

 lections. The other, given in fig. 8, agrees well with some of the Oregon 

 plants. 



PL XV, Fig. 1, represents one of the largest leaves. It is nearly 

 entire. Fig. 2 gives a leaf with a base more elliptic in form. Fig. 3 shows 

 the basal portion of one of the smallest leaves seen. This plant is nowhere 

 abundant, but is pretty widely difi^used. It is most common at locality 

 No. 2, but occurs also at localities Nos. 1, 7, 14, 18, and 19. 



"Unger (Synops. PI. Foss., p. 56) referred Goppert's Carboniferous species Adiantites cuneatus (Syst, 

 Fil. Foss., p. 226) to Cyclopteris, and Carruthers (Quart. Journ. Geol. Soc. London, Vol. XXVIII, August. 

 1872, p. 354) named a new species Oydopteris cuneata from the Carboniferous of Queensland. — L. F. W. 



^Geology of Yorkshire, 3d ed., p. 203. 



«Foss. Fl. Gt. Brit., Vol. I, pi. Lxiii. 



f' Notes on some Jurassic Plants in the Manchester Museum, Manchester Memoirs, Vol. XLIV, Pt. Ill 

 1900, pp. 11-14, pi. iii, figs. 7, 8. 



