6 HISTORICAL SKETCH. 



Eddy — Flora plandomensis in Long Island. 



Croom 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 ; tbey have been given 

 by Marshall, Philadelphica 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 Enghsh 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 



