SYSTEMATIC DESCRIPTIONS. 
Phylum PTERIDOPHYTA. 
Class LEPTOSPORANGIATAE. 
Order POLYPODIALES. 
Family POLYPODIACEAE. 
Genus CLADOPHLEBIS Brongniart. 
Cladophlebis dakotensis (Lesquereux) Berry. 
Pteris dakotensis Lesquereux, U. 8. Geol. Survey Mon. 17 
(Flora of the Dakota group), p. 24, pl. 1, figs. 2, 3, 
1892. 
This species, the type material of which 
was collected 10 miles northeast of Delphos, 
Kans., was described as follows by Lesquereux: 
Ultimate pinnae linear-lanceolate, pinnately deeply 
cut into oblique equal subopposite lanceolate blunt- 
pointed and subfalcate pinnules, connate above the base, 
entire, close but disconnected above; median vein thin, 
distinct; secondaries opposite, 6~7 pairs, simple, curving 
upward in passing to the borders. 
This form is obviously to be referred to the 
genus Cladophlebis, which was so abundant 
during the Mesozoic era. It was referred to 
Pteris by Lesquereux; as was the habit among 
earlier paleobotanists. The material which 
Lesquereux had and that from the Cheyenne 
‘sandstone are both ‘too meager for critical 
comparisons with other described species of 
Cladophlebis. The two specimens from: the 
Cheyenne sandstone came from Thompson 
Creek near the Flume, 2 miles northwest of 
Belvidere (2221). 
Genus ASPLENIUM Linné. 
Asplenium dicksonianum Heer. 
Asplenium dicksonianum Heer, Flora fossilis arctica, vol. 
8, Abt. 2, p. 31, pl. 1, figs. 1-5, 1874; vol. 6, Abt. 2, 
pp. 3, 33, pl. 2, fig. 2; pl. 32, figs. 1-8, 1882. 
Dawson, Roy. Soc. Canada Trans., vol. 1, sec. 4, p. 
11, 1883 ; vol. 3, sec. 4, p. 5, pl. 3, fig. 1, 1885; Canada 
Geol. Survey Ann. Rept., new ser., vol. 1, p. 76, 
1886; Roy. Soc. Canada Trans., vol. 10, ,sec. 4, p. 91, 
1892. 
Lesquereux, The flora of the Daikota group, p. 24, pl. 
1, fig. 1, 1892. 
Newbery, The flora of the Amboy clays, p. 39, pl. 1, 
figs. 6, 7; pl. 2, figs. 1-8; pl. 3, fig. 3, 1896. 
Sa U.S. Geol. Survey Nineteenth Ann. Rept., pt. 
2, p. 704, pl. 170, fig. 1, 1899; Jour. Geology, vol. 2, 
pp. 259, 261, 1894. 
Fontaine, in Ward, U. 8. Geol. Survey Nineteenth 
- Ann. Rept., pt. 2, p. 664, pl. 162, figs. 6-8, 1899 (not 
Fontaine, 1888). 
Kurtz,. Contribuciones 4 la palaeophytologia argen- 
tina, III: Mus. La Plata Rev., vol. 10, p. 49, 1899 
[1902]. 
FLORA OF THE CHEYENNE SANDSTONE OF KANSAS. 
207 
'Berzy, Torrey Bot. Club Bull., vol. 38, p. 409, 1911; 
New Jersey Geol. Survey Bull. 8, p. 68, pl. 5, figs. 
8, 4, 1911; Maryland Geol. Survey, Upper Creta- 
ceous, p. 767, 1916; U. S. Geol. Survey Prof. Paper 
112, p. 53, 1919. ; 
This species was described by Heer in 1874 
from material found in the Kome beds (Lower 
Cretaceous) of Greenland. It was subse- 
quently identified by Heer in material from the 
much later Atane beds (Upper Cretaceous) of 
Greenland; Dawson reported lit from a number 
of localities in the Kootenai formation (Lower 
Cretaceous) of British Columbia, although 
these records are questionable; and Fontaine 
and Ward described it from specimens obtained 
in the Lower Cretaceous of the Black Hills. It 
is also reported by both Lesquereux and Ward 
from the Dakota sandstone, and by Kurtz 
from “Argentina. It seems very doubtful if 
these specimens can all be the same plant, and 
the geologic range alone suggests that the ear- 
lier and the later forms may be distinct. The 
Lower Cretaceous forms certainly suggest a 
relationship with those widespread types of 
sterile fronds variously identified as Thyrsop- 
teris or Onychiopsis, and they may be com- 
pared with Onychiopsis goeppertt (Schenk) 
Berry. The Upper Cretaceous forms suggest 
Anemia rather. than Aspleniwm and are much 
like the widespread Eocene species Anemia 
haydenit (Lesquereux) Cockerell and Anemia 
subcretacea (Saporta) Gardner and’ Ettings- 
-|hausen. However, in the absence of repre- 
sentative material from the different horizons, 
it seems unwise to attempt any segregation at 
the present time, and the synonymy is cited in 
full for the use of some future student who may 
have access to enough material to enable him 
to make an accurate revision and segregation 
of this so-called species. Attention should also 
be called to its resemblance to the form occur- 
ring in the Upper Cretaceous of Greenland, the 
Raritan formation of New Jersey, and the Tus- 
caloosa formation of Alabama which goes by 
the name Dicksonia groenlandica Heer, al- 
though the ground for considering it a Dick- 
sonia is entirely inconclusive. 
Besides occurring at the localities named 
above the present species is abundant in the 
Raritan formation of New Jersey and Mary- 
land, and material that is absolutely identical 
with the New Jersey Raritan material which I 
have seen and with that from the Dakota sand- 
stone is present in the Tuscaloosa formation of 
