APPENDIX A 597 



The Major Plant Groups and Some of Their Subdivisions 



SUBKINGDOM I. THALLOPHYTA 



The simplest plants. Body a thallus without true roots, stems or leaves. Mostly 



microscopic or small 



PHYLUM I. THALLOPHYTA. Algae and Fungi. 

 Subphylum I. Algae. (Containing chlorophyll.) 



Class 1. Myxophyceae. (Cyanophyceae.) The Blue- 

 green Algae. 



Class 2. Chlorophyceae. The Green Algae. ) Algae, 



Class 3. Bacillariophyceae. The Diatoms. 



Class 4. Phaeophyceae. The Brown Algae. 



Class 5. Rhodophyceae. The Red Algae. / VTHAL- 



Subphylum II. Fungi. (Without chlorophyll.) \ / LOPH^ 



Class 1. Schizomycetes. The Bacteria. 



Class 2. Myxomycetes. The Slime Molds. 



Class 3. Phycomycetes. The Algalike \ 



Fun i ) > Fungi 



_, '. , . .,-_.( Eumvcetes. , 



Class 4. Ascomycetes. The bac lungi. } ^ -^ 



™ ,. -■-> ™ ™ , llruerungi. 



Class 5. Basidiomycetes. Ihe Club j 



Fungi. ' 



S UBKINGDOM II . EM BR YOPH Y TA 



Developing an embryo from a zygote produced by fusion of gametes 



Phylum II. BRYOPHYTA. Liverworts and Mosses. 

 Class 1. Hepatic ae. The Liverworts. 

 Class 2. Musci. The Mosses. 

 PHYLUM III. TRACHEOPHYTA. The Vascular Plants. 

 Subphylum I. Psilopsida. *Psilophytales. (Rhynia, etc.) 

 Subphylum II. Sphenopsida. The Wedge-leafed Plants. 

 Class 1. Equisetinae. The Horsetails. (*Calamites, Equise- 



tum.) \PTERI- 



Subphylum III. Lycopsida. The Small-leaved Plants. / DOPHYTA 



Class 1. Lycopodinae. The Club Mosses and Allies. (*Lepi- 

 dodendron, *Sigillaria, Lycopodium, Selaginella, Isoetes.) 

 Subphylum IV. Pteropsida. The Large-leaved Plants. 

 Class 1. Filicinae. The Ferns. 



BRY- 

 OPHYTA 



