voluminous Geology of Pennsylvania, Almost annually 
thereafter Lesquereux published notices, papers,or mono- 
graphs on paleobotanical discoveries. 
He was by no means limited or provincial in his in- 
terest, although his name is usually linked with the study 
of Coal Measures plants. As early as 1860 he published 
a report on Miocene plants from Brandon, Vermont, and 
soon after on an Eocene flora from Mississippi. These 
were followed by reports on Cretaceous and ‘Tertiary 
floras from the Western ‘Territories. 
The reputation as a paleobotanist which Lesquereux 
quickly acquired was really phenomenal. Material from 
all parts of the country was sent to him for study. Pro- 
fessor Agassiz engaged Lesquereux from 1865 to 1871 
to work up the collection of fossil plants, then kept in 
the Museum of Comparative Zoology. Although he con- 
tinued to maintain his legal residence in Columbus, 
Lesquereux spent several months of each year with the 
collection, and borrowed new or unusual specimens for 
study at his private laboratory. He published or rather 
submitted his first reports on the collection in 1867, and 
again in 1868. Whereas the collection was at this time 
remarkably rich in European specimens trom classic lo- 
calities and correspondingly poor in American plants, 
Lesquereux donated his collection of types in 1868. Sub- 
sequently all materials passing through his hands were 
deposited in the Museum Collection. 
Each major contribution to American paleobotany 
marked a major advance in the status of the collection. 
Beginning in 1879 there appeared his great Coal Flora 
of Pennsylvania. First the Atlas of plates, then volumes 
one and two (bound together) 1880, and finally volume 
three in 1884. Simultaneously he was publishing the 
Miocene flora of California, a Permian collection from 
Colorado, and a Cretaceous flora from Colorado, The 
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