112 



LARAMIE FLORA OF THE DENVER BASIN. 



tially in having the nerves at a more acute 

 angle and regularly twice-forked. The nerves 

 are also frequently anastomosed, especially 

 near the margin. 



This species is named in honor of Marcus I. 

 Goldman, of the United States Geological 

 Survey, who assisted in making the collection 

 at this locality. 



Occurrence : Laramie formation, Popes Bluff, 

 west of Pikeview, Colo. (sec. 14, T. 13 S., 

 R. 67 W.), collected by A. C. Peale and M. I. 

 Goldman, 1908. 



Pteris? sp. 



Plate II, figure 5. 



Pteris? sp. Knowlton [nomen], U. S. Geol. Survey Bull. 

 696, p. 513, 1919. 



The specimen here figured is so small a 

 fragment that were it not for the fact that it is 

 very different from anything heretofore found 

 in the Laramie, it would hardly be worthy of 

 mention. It is the wedge-shaped basal por- 

 tion of what was apparently a large lanceolate 

 frond or pinnule. The midrib was exceedingly 

 thick, and the blade appears also to have been 

 thick or coriaceous. The nerves are very fine, 

 close, parallel, and at a low angle of emergence. 

 It is difficult to ascertain whether the veins 

 fork at the extreme base or are simple, though 

 presumably they are forked just above their 

 point of origin. Occasionally a vein may be 

 observed to fork near the middle, but beyond 

 this little can be made out. 



This fragment is so small and obscure that 

 comparisons with other forms are hardly war- 

 ranted, though in passing it may be said that 

 the specimen somewhat resembles what Les- 

 quereux described as Gymnogramma gardneri, 3S 

 especially in the shape of the base and the 

 thick midrib, but it differs strongly in the more 

 numerous finer veins, which do not anastomose. 



Occurrence: Laramie formation, Marshall, 

 Colo., wooded bluff just south of station, at 

 the highest plant-bearing point in the section, 

 collected by A. C. Peale. 



Family SCHIZAEACEAE. 



Anemia elongata (Newberry) Knowlton. 



Plate II, figure 2. 



Anemia elongata (Newberry) Knowlton, U. S. Geol. Sur- 

 vey Bull. 696, p. 74, 1919. ' ! * 



as Lesquereux, Leo, U. S. Geol. Survey Terr. Kept., vol. 7, pi, 4. 

 fig. 2, 1878. 



Sphenopteris (Asplenium) elongatum Newberry, Boston 

 Soc. Nat. Hist. Jour., vol. 7, p. 511, 1863. 



Anemia subcretacea'? (Saporta) Gardner and Ettingshausen, 



British Eocene flora, vol. 1, Filices, pt. 2, p. 45, 



pis. 8, 9, 1880. 



Knowlton, U. S. Geol. Survey Bull. 152, p. 34, 1898; 



Mon. 32, pt. 2, p. 657, 1899; Bull. 163, p. 20, 1900. 



Anemia perplexa Hollick, in Newberry, U. S. Geol. Sur- 

 vey Mon. 3?, p. 3, pi. 15, figs. 1, la, 1898. 



Gymnogramma haydenii Lesquereux, U. S. Geol. and Geog. 

 Survey Terr. Ann. Rept. for 1872, p. 295, 1873; 

 Tertiary flora: U. S. Geol. Survey Terr. Kept., 

 vol. 7, p. 59, pi. 4, figs. 1-3, 1878. 



Anemia haydenii (Lesquereux) Cockerell, Torreya, vol. 9, 

 p. 142, 1909. 



My understanding of the status of the Ameri- 

 can material usually referred to Anemia sub- 

 cretacea is set forth at length in my "Flora of 

 of the Montana formation," 30 and I have little 

 or nothing to add to that account. One diffi- 

 culty in the study of ferns of this group is lack 

 of sufficient material, for somehow it happens 

 that although Anemia is fairly well distributed 

 both geologically and geographically, it is 

 rarely found abundant or well preserved. The 

 type specimens of Lesquereux's Gymnogramma 

 haydenii, for instance, are mere fragments that 

 can give only a partial idea of its size and ap- 

 pearance. The example here figured, although 

 exceptionally well preserved, is the only one 

 present in the collections from Erie. It is al- 

 most entire in the upper portion and sparingly 

 toothed below, but otherwise it is very much 

 like the figures of Gymnogramma haydenii. It 

 is rather more robust than the figures of the 

 English species shown by Gardner and Ettings- 

 hausen would imply, though it approaches that 

 species most closely. I have questioned the 

 reference of the Erie specimen to Anemia sub- 

 cretacea rather than make a new species. If 

 additional material can be procured it may 

 serve to settle the status of this form. 



Occurrence: Laramie formation, ?Erie,. Colo.; 

 Mesaverde, ?Point of Eocks, Wyo.; Puget 

 group, ?Washington. 



Anemia supercretacea Hollick. 



Anemia supercretacea Hollick, Torreya, vol. 2, p. 145, pi. 

 3, figs. 6, 7, 1902. 

 Cockerell, Torreya, vol. 9, p.142, 1909. 



This species was described by Hollick from 

 material collected in the well-known reddish 

 sandstone at Florence, Colo., from beds then 

 supposed to be of Laramie age but subse- 



» Knowlton, F. H., U. 8. Geol. Survey Bull. 163, pp. 20-22, 1900. 



