JURASSIC FLORA OF DOUGLAS COUNTY, OREG. 69 



1836. Aletho-pteris Phillipsii (Brongn.) Gopp.: Syst. Fil. Foss., p. 304. 

 1836. Alethopteris insignis (L. & H.) Gopp.: op. cit., p. 307. 

 1836. Polypodites undans (L. & H.) Gopp.: op. cit., p. 345. 



1848. AletJiopteris denticulata (Brongn.) Gopp.: Index Pal., Nomenclator, p. 23. 



1849. Cladophlehis ligata (Phill.) Brongn.: Tableau, p. 105. 



1865. Pteris ligata (Phill.) Ett.: Farnkrauter der Jetztwelt, p. 113. 

 1865. Pteris insignis (L. & H.) Ett.: op. cit., p. 114. 

 _1874. Cladophlehis insignis (L. & H.) Schimp.: Pal. Veg., Vol. Ill, p. 505. 

 1876. CladopUebis denticulata (Brongn.) Nath. [non Font.]: Bidrag till Sveriges 



Foss. Fl., Viixter fr. Riit. Form, vid Palsjo, p. 19. 

 1878. Asplenium petruschinense Heer: Fl. Foss. Arct., Vol. V, Pt. II (Beitr. z. 



Foss. Fl. Sibiriens), p. 3, pi. i, figs. 1, lb. 

 1882. Pteris frigida Heer: Fl. Foss. Arct., Vol. VI, Abth. II, Foss. Fl. Gronl., Pt. I, 



pp. 3, 25, pi. ii, fig. 13; pi. vi, fig. 5b; pi. x, figs. 1-4; pi. xi, figs. 1-4, 5a, 



6, 7a, 8a, 9-11; pi. xiii, figs. 2, 2b; pi. xvi, figs. 1, 2; pi. xvin, fig. 10b. 

 1882. Pteris longipennis Heer: op. cit., p. 28, pi. x, figs. 5-13; pi. xiii, fig. 1. 

 1888. CladopUebis denticulata Font, [non (Brongn.) Nath.]:" Potomac Flora, p. 71, 



pi. iv, figs. 2, 2a; pi. vii, figs. 7, 7a. 

 1896. Cladophlehis steioartiana Hartz: Medd. om Gr0nl., Vol. XIX, p. 231, pi. xi, 



figs. 1, 2; pi. xii, figs. 2, 3. 

 1896. Asplenites f? sp. Hartz: op. cit., p. 231, pi. xi, figs. 3, 3a. 



Fragments of what was evidently a large fern of Cladophlehis type 

 were found sparingly at some of the localities. Considering the strength 

 of some of the parts preserved, and their good state of preservation, the 

 comminution of this fern is remarkable. Only sterile forms were found. 

 The largest specimens show only small bits of ultimate pinna;. Some 

 yield only scattered pinnules and fragments of pinnules. The pinnules 

 seem to have had a leathery, firm texture. The rachis of the ultimate 

 pinna is strong and rigid. The pinnules are more or less falcate, some- 

 times strongly so . They are attached by the whole of a somewhat expanded 

 base. The larger normal pinnules are oblong linear in form, with lancet- 

 shaped subacute tips. Those in terminal parts are shorter, sometimes 

 approaching a triangular form. The nervation is quite characteristic. 

 The midnerve is strong and persists to near the tip of the pinnule, having 



« Professor Fontaine described this as a new species, but he notes its resemblance to Pecopteris denticu- 

 lata Heer non Brongniart from the Cretaceous of Greenland. Mr. Seward places it in his synonymy of the 

 Yorkshire plant which was described under that name by Brongniart in 1834, and which Nathorst seems to 

 have been the first (1876, see synonymy) to refer to Cladophlehis. Mr. Seward, however, does not include 

 Heer's plant in his synonymy, and in mentioning it on p. 141 he seems to think that it was the same as 

 Bron<Tiiart's, but Heer's was also called a new species. This makes an unfortunate confusion of names of 

 closely related forms, which it is difficult to make clear. — L. F. W. 



