494 BIOGRAPHICAL SKETCHES. 
this came those earliest papers which have already been men- 
tioned. Also his “ Synopsis of the Lichens of New England, 
the other Northern States, and British America,” communi- 
cated to this Academy in the autumn of 1847, which is the 
most considerable botanical contribution to the first volume of 
the Proceedings. The fourth, fifth; sixth, and seventh vol- 
umes contain other of his Lichenological papers, of wholly 
original matter and critical character, — largely upon collec- 
tions which had begun to come to him from the Rocky Moun- 
tain region, from Texas, the Pacific coast, the Sandwich Is- 
lands, and especially from the rich materials gathered in Cuba 
and elsewhere by the late Charles Wright. In these years, 
too, he much helped the study of his favorite plants by the 
preparation and issue of his “ Lichenes Americe Septentrio- 
nalis Exsiccati,” in six fasciculi, or three volumes, highly 
valued by those who fortunately possess them. Equally for- 
tunate are the herbaria which possess the “ Lichenes Caroli 
Wrightii Cube curante E. Tuckerman,” which authenticate 
his thorough work upon that portion of Mr. Wright’s Cuban 
collections that he undertook to elaborate. 
Passing without notice.various subsidiary contributions 
both to journals and to the reports of exploring expeditions, 
we come to a pamphlet which he independently published at 
Amherst, in 1866, entitled “ Lichens of California, Oregon, 
and the Rocky Mountains, so far as yet known,” which, small 
though it be (pp. 35, 8vo), is particularly noteworthy; for 
in this he lays down the principles and matured opinions 
which he had adopted, and which he firmly adhered to, for 
the taxonomy and classification of Lichens. These are fully 
exemplified in the two systematic works to which Professor 
Tuckerman’s later years and maturest powers were persist- 
ently devoted, —works which, partly from their publication 
somewhat out of the ordinary channels, are by no means so 
well known as they should be, but which surely secure to their 
author the position of a master in his department, — in which, 
indeed, we suppose he has left behind him no superior. 
These works are, first, the ‘Genera Lichenum, an Arrange- 
ment of the North American Lichens ” (pp. 283, 8vo), pub- 
