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 Schvveinitz — Fungi and He- 
patica — Carex and Viola. 
Torrey — On Cyperacea. 
Grey — On Rhynchospora. 
Leconte — On Utricularia, Ruellia. 
Dewey— -On Car exides 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. 
Bose — 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, Lamar k 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 
