NOTE TO THE AMERICAN EDITION. 
. 
In Appendix B the American publishers supplement 
the author’s scheme of the Cryptogamia with another 
compiled from the writings of De Bary, Farlow, Eaton, 
and others, in which there is an attempt made to divide 
these plants into orders of approximately equivalent 
value. It must be admitted, however, that scarcely any 
two Cryptogamists could be found who would agree on 
any system of classification. 
