APPENDIX 
TO 
THE PHYTOLOGIST 
Fob 1851. 
Art. I. — Synoptical Table of the British Ferns. 
By Edward Newman. 
Ohs. — This is confessedly but a crude attempt to arrange our ferns in 
accordance with their natural affinities. After maturely considering the 
associations upon which heretofore so much stress has been laid, I have ar- 
rived at the conclusion that they are unsatisfactory ; and yet, in abandoning 
such divisions as Polypodium of the Linnean school ; as Aspidium, so ear- 
nestly advocated by Smith and Hooker in this country, and equally great 
names on the Continent ; and as the more recent combination called Las- 
trea by Presl and John Smith, and formerly adopted by myself; I feel as 
one groping his way in the dark, and shall eagerly avail myself of any 
friendly hand that may be held out to support and direct my tottering and 
uncertain footsteps. 
Vegetables are divided by botanists into four primary groups, 
one of which, called Exogens*, is single, and the others, seve- 
rally called Endogens, Acrogens, and Tliallogens, are double ; 
that is, each of them contains two groups, which, in intimate 
structure, are alike, but in certain less important characters 
differ. 
Acrogens are either Filicoid, or ferns and their allies ; or 
Muscoid, or mosses and their allies. 
Filicoid Acrogens are divided into seven secondary groups, 
called Orders ; which however consist of a single one and three 
pairs ; so that the divisions of the secondary, are in fact nume- 
rically identical with those of primary groups. 
appendix rv. A 
