86 MESOZOIC FLORAS OF UNITED STATES. 



1S36. Adiantites irregularis Gopp.: Op. cit., p. HS5. 



1838. Cydopteris cuneata (L. & H.) Presl [non (Gopp.) Ung. noc Carr.]" in Stern- 

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



1838. Tifnloptcris PhiUipsii (Brongn.) Pre.sl in Sternberg: Op. cit., ]). 140. 



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



1849. PJiyUopteriti PhiJUpsii Brongn.: Tableau, pp. 22, 10.5. 



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



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



Forms that agree exactly with Sageno])icris jxtucifolia 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 are narrowly ellip- 

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

 elliptical. They narrow gradually to their liases 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. Goeppertiana 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 more distinctly defined than in S. Gceppertiana, 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. 



PI. 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, l)ut 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. PL Foss., p. .56) referred Gc'>ppert's Carboniferous species Adiantites cuneatus (Syst, 

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

 1872, p. 3.54) named a new species Cyclopteris cuneata from the Carboniferous of Queensland. — L. F. W. 



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



cFo.ss. Fl. Gt. Brit., Vol. I, pi. Ixiii. 



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

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



