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 American 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 Cuba3 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- 



