44 THE AMERICAN BOTANIST. 



sey proposes to divide the plants into fifteen great groups or 

 phyla as follows : 



Myxophyceae. Blue-green algae. Bacteria, etc. 



Protophyceae. The simple green algae. 



Zygophyceae. The conjugate algae. 



SiPHONOPHYCEAE. The coenocytic algae and fungi. 



Phaeophyceae. The brown algae. 



Carpophyceae. The red algae and chara. 



Carpomyceteae. The higher fungi. 



Bryophyta. Mosses and liverworts. 



Pteridophyta. The Ferns and quillworts. 



Calamophyta. The Horsetails. 



Lepidophyta. Lycopodium and Selaginella. 



Cygadophyta. The joint firs. 



Gnetales. The conifers. 



Strobilophyta. The Conifers. 



Anthophyta. The flowering plants. 



Contrasted with this is the arrangement proposed by Prof. 

 J. H. Schaffaer in Ohio Naturalist for April 1909. His ar- 

 rangement adds one more phylum and re-distributes various 

 problematical small groups, but in general the lists agree very 

 well. The list follows : 



Sghizophyta. Fission plants, 2,400 species. 



Myxophyta. Slime moulds, 400 species. 



DiATOMEAE. Diatoms, 3,000 species. 



CoNjuGATAE. Conjugate Algae, 1,200 species. 



GoNiDiOPHYTA. Most green algae, 2,000 species. 



Phaeophyta. Brown algae, 1,000 species. 



Rhodophyta. Red algae 2,000 species. 



Chareae. Stoneworts, 160 species. 



Mycophyta. Fungi, 47,000 species. 



Bryophta. Mosses, etc., 17,000 species. 



Ptenophyta. Ferns, 4,500 species. 



Calamophta. Scouring Rushes, 25 species* 



