212 APPENDIX. 
Acrogena. 
ORDER I.—Fiilices, or Ferns. 
»  IlL—£guisetacee, or Horsetails. 
Vascular plants pos- »  Ill.—Marcileacee, or Pepperworts. 
sessing distinct »  1V.—Lycopodiacee, or Club-mosses. 
stem and leaves ni V.—Musci, or True Mosses. 
(or fronds). With »  Wl.—/ungermanniacee, or Scale-mosses, 
stomata. », Wlil.—WMarchantiacee, or Liverworts. 
», VIIl.—Ricciacee, or Crystalworts. 
»,  LX.—Characee, or Stoneworts. 
Thallogene. 
Cellular plants, with no ORDER I.—JLichenes, Lichens. 
distinction between 
vaeiaeg 5, 11.—/2ngi, Mushrooms and Moulds, 
eT risen aban: ,, Ill.—Alge,* Seaweeds. 
* Besides the Seaweeds and Conferve, this order comprises the 
Diatoms, Desmids, and Volvoces described in Chapter I. 
