$ HISTORICAL SKETCH. 



Eddy Flora plandomensis in Long Island. 



Groom and Loomis Plants of Florida. 



Monographs of Families or Genera are far 

 more useful than Catalogues, because they en- 

 large our knowledge of Species, and make us 

 acquainted with them. Among these I must 

 chiefly mention Schweinitz Fungi and He- 

 patica Carex and Viola. 



Torrey On Cyperacea. 



Grey On Rhynchospora. 



Leconte On Utricularia, Ruellia. 



Dewey On Carexides nearly 200Sp. deem* 

 ed still a Genus. 



Rafinesque On Vitis. Trillium, Gentiana, 

 Heuchera, Houstonia, Rosa, Lysimachia. 



Michaux On Oaks or Quercus. 



Muhlenberg On Willows or Salix. 



Bosc On Fraxinus. Nuttal, on Sarrazinia. 



Muhlenberg, on Grasses. 



Halsey, on Lichens. 



Sylvas or Dendrologies are also monographs 

 of our Trees and Shrubs ; they have been given 

 by Marshall, Philadelphia 1784. 



Castiglione, in Italian 1790. 



Vangenheim. in Germany with figures. 



Michaux, in France with figures, and a late 

 compiled translation has lately appeared in 

 New England with wood cuts. 



My New Sylva or Supplement to our Trees 

 and Shrubs, will be additional in this work. 



Iconographical Works like those of Catesby, 

 Abbot, Lamark illustrations, the English Bota- 

 nical magazines <c. are too costly to succeed 

 with us Dr. W. P. C. Barton, flora of North 

 America on this plan, could only extend to a 

 couple of volumes and about 120 Species ! His 

 Medical Flora and that of Bigelow extended 



