Part. IL The tertiary Flora; Washington, 1878, in-4°, 
366 p., with 65 plates. 
Part. III. The cretaceous and tertiary Flora ; Washington, 
1883, in-4°, 283 p., with 59 plates. 
1. On the âge oftlie lignitic formations of the Focky Moun- 
tains ; Amer. Journ. of se. a. arts, vol. VII, 1874, 12 p. 
2. Species of fossil marine plants from the Carboniferous 
measures ; 7 th ann. Rep. of the Geolog. Survey of In- 
diana: 1875, 12 p., with 2 plates. 
3. On some neiv species of fossil plants from the lignitic 
formations, p. 363-400; Columbus, 1875. 
-4. New species of fossil plants from the cretaceous forma¬ 
tion of the Dakota group ; Columbus, 1875. 
5. Silurian plants : Land plants, recently discovered in the 
Silurian Rocks of the U.-S.; Amer. Phil. Soc. Proc., 
1877, VII, p. 163-175, with 1 pi. 
6. Notice of Gaston de Saporta’s Work : The Plants of the 
World before the advent of man; Amer. Journ. of sc. 
a. arts, 1879, XVII, 13 p. 
7. On the tertiary Flora of the North American lignitic 
considered as evidence of the âge of the formation. 
Geol. Survey of the Territories, p. 275-365. 
•8. Flore des houillères des Etats-TJnis; 1880, 700 p., 40 pi. 
9. Remarks on the cretaceous and tertiary Flora of the 
Western Territories ; Amer. Natur., 1882, p. 102-108. 
'0. Manual of the Masses of North America, bv Léo Les- 
quereux a. Thoinas-P. James, with 6 pl. ; Boston, 1884. 
