20 FLORA OF THE MONTANA FORMATION. 
Habitat. — Goal mine on north fork of Dutton Creek, near old stage 
road, Laramie Plains, Wyoming. Collected by Knowlton, Stanton, and 
Knight, July, 1896. 
ASPLENIUM Sp. 
PI. Ill, tig. 11. 
This fragment is so small that it is hardly worthy of notice, yet it 
appears to differ from any form found, either in these beds or in allied 
horizons. It is a fragment, evidently from a large pinnule, only 2 cm. in 
length. The rachis or midvein is very broad and serrate striate. The 
veins are close, parallel, emerging at a very low angle, and forking 
once at or near the rachis, or, rarely, unforked. Further description it 
is impossible to give. 
This form is evidently quite close to Asplenium subsimplex (Lx.) 
Kn., and may be the same. It seems to differ, however, by the closer 
veins emerging at a lower angle and unforked or forking near the 
base. 
Habitat. — Coal mine on north fork of Dutton Creek, near old stage 
road, Laramie Plains, Wyoming. Collected by Knowlton, Stanton, 
and Knight, July, 1896. 
Anemia subcretacea (Sap.) Gard. and Ett. 
Anemia subcretacea (Sap.) Gard. and Ett., Mon. Brit. Eocene Fl., Vol. I, Pt. II, p. 45, 
Pis. VIII, IX (1880.) 
Asplenium subcretaceum Sap., Fl. Foss. Suzanne: Mem. Soc. Geol. d. France, 3d ser., 
Vol. VIII, p. 315, PI. XXIII; fig. 4 (1868). 
Gymnogramma Haydenii Lx., Ann. Rept. U. S. Geol. and Geog. Surv. Terr., 1871, 
p. 295 (1872) ; Tert. FL, p. 59, PL IV, figs. 1-3 (1878). 
tLathrcea arguta Lx., Am. Jour. Sci., 2d ser., Vol. XLV, p. 207 (1868). 
Stipe dichotomous; frond bipinnate or tripinnate; pinnse ovate- 
oblong; pinnules sessile, subdecurrent, or sometimes slightly stipitate, 
long-lanceolate or linear-lanceolate, acuminate, pinnately divided to 
near the rachis into oblong-lanceolate, mostly acute, lobes; lower lobes 
distantly, sometimes rather sharply, toothed; upper lobes gradually 
becoming crenulate or sometimes entire; rachis narrow; middle nerve 
thin; lateral veins moderately close, at an acute angle of divergence, 
usually once-forking. 
The above description is combined, with slight modifications, from 
the descriptions given by Lesquereux and by Gardner and Ettings- 
hausen, for after a thorough examination of the types Gymnogramma 
Haydenii, together with a number of recently collected specimens, and 
the drawings and descriptions of Anemia subcretacea, I am convinced 
that the English authors are right in uniting them. They have had, 
as they say, abundant and exceptionally well preserved material for 
comparison, and have submitted specimens and drawings to several 
well-known authorities, so that there can be little doubt as to the cor- 
rectness of their conclusions. Saporta, who first named the species from 
