192 



have the assistance of such a work. The want, we hope, will not long 

 remain unsupplied. 



AcHAKius, the father of Lichenology, as he has been styled, pub- 

 lished numerous American Lichens in his LichenograpMa Universalis, 

 Gottingen, 1810 ; and Synopsis Lichenum, Lund, 1814. Swartz, in his 

 Lichenes Americani, Norimberg, 1811, one number only of which was 

 published, gave an account of twenty-five American species, mostly 

 from the West Indies. He mentions two New England species, Par- 

 melia colpodes and P. congruens, the latter of which, however, is un- 

 known to our Lichenists, and the plant described is probably only a 

 form of some other plant. 



The Flora Virginica of Gronovius, Leyden, 1739, in which the plants 

 collected by Clayton are described, mentions a few Lichens. But to 

 come to American publications. 



The Index Florcn Lancastriensis, by Muhlenburg, Vol. III. of the 

 Transactions of the American Philosophical Society, Philadelphia, 

 1793, contains a list of thirty Lichens, concluding with the remark, 

 " et alii -multi novi." All these were pi'obably included in his Catalo- 

 gus Plantarum America! Septentrionalis, Philadelphia, 1818. He gives 

 the name of 184 species, arranged according to the Acharian System, 

 eighteen of which are noted as new. There are no descriptions of 

 the plants, but according to Professor Tuckerman in the Boston 

 Journal of Natural History, they are described in the sixth edition 

 of Eaton's Manual, 1833, a work which the present writer has not 

 seen. 



Professor Torrey, in his Catalogue of Plants growing spontaneously 

 loithin Thirty Miles of the City of New York, Albany, 1819, enumerates 

 sixty species of Lichens, and gives their stations. There are no new 

 species in his list. 



In the American Journal of Science, Vol. VI, p. 105, Professor Tor- 

 rey describes, under the name of Usnea fasciata, the plant called in 

 Tuckerman's Synopsis, IT. sphacelata E. Br., and since, IT. aurantiaco- 

 atra Jacq. 



The next publication is Halsey's Synopsis of the Lichens near New 

 York, published in 1823 in Vol. I. of the Annals of the Lyceum of 

 Natural History. This is a valuable catalogue, enumerating 176 spe- 

 cies, with their stations, and giving brief descriptions, with colored 

 figures of four species. Nine are new, of which descriptions are fur- 

 nished by Schweinitz. Halsey alludes to a promised work on Lichens 

 by Schweinitz, but this was never given to the public. 



The Catalogue of Animals and Plants of Massachusetts, in Professor 

 Hitchcock's Report on the Geology, Botany, and Zoology of that 

 State, was published separately at Amherst in 1835. It gives 116 Lich- 

 ens as occurring in Massachusetts. 



