—78 — 
31. On Some New Species of Fossil Plants, Tertiary. Bulletin 52, second 
series of Hayden. 1875. 
On Some New Species of Fossil Plants, Cretaceous. 1875. 
32. Report on the Cretaceous and Tertiary Floras of Western Territories. 
Hayden’s Report, and separate copies. 1874. 
33. Species of Fossil Marine Plants found in the Carboniferous Measures. 
Geological Survey of Indiana, Seventh Annual Report. 1876. 
34. Plants of the Silurian. Proceedings of the Philosophical Society of 
Philadelphia. 1877. 
35. Contributions to the Fossil Flora of the Western Territories. United 
States Geological and Geographical Survey. 
The Tertiary Flora. 1877. 
36. Pliocene Flora of the Auriferous Gravel of California. Museum of Com- 
parative Zoology, Cambridge. 1878. 
37. Catalogue of the Fossil Plants of the Tertiary and of the Cretaceous. 
Hayden’s Report. 1878. 
38. On Cordaites. American Philosophical Society. 1878. 
-39. On a Branch of Cordaites bearing Fruit. American Philosophical 
Society. 1879. 
40 The Coal Flora (Atlas). Second Pennsylvania Geological Survey. 1879- 
1884. 
41. The Coal Flora (Text). Three volumes. 1880-1884. 
42. Manual of the American Mosses. With Collaboration of Thomas P. 
James. 1884. 
43. Monograph} 7 of the Cretaceous and Tertiary Flora of the United States. 
Geological and Geographical Survey of the Territories, vol. viii. 1883. 
44. Principles of Paloeozoic Botany. Geological Report of Indiana. 1884. 
45 - Vegetable Origin of Coal. Report of the Geological Survey of Pennsyl- 
vania. 1885. 
46. Divers Questions concerning Coal. Silliman’s Journal, i860. 
On the Fossil Fruits of the Lignites of Brandon. 1861. 
On Some Fossil Plants of the Recent Formations. 1859. 
On Some Fossil Plants of John Evans. 1859. 
On the Origin and Formation of the Prairies. 1865. 
On the Formation of Lignite Beds. 1874. 
On Land Plants in the Lower Silurian. 1874. 
See further articles in Am. Jour. Science, III, 38: 499-500, 1889. Bot. 
Gaz. 15: 16-19, 1890. Ann. Bot. 3: 467-470, 1890. Proc. Am. Acad. 25: 320- 
324, 1890. Am. Geol. 5; 291, 292, 1890. Monog. U. S. Geol. Surv. 17: 15- 
18, 1892. 
