OUTLINE OF CLASSIFICATION. 417 



Subkingdom II. BRYOPHYTA. Bryophytes. Mossworts. 



Class I. Hepaticae. Liverworts. 

 Order 1. Ric dales. 



Riccia. 

 Order 2. Marchantiales. Liverworts. 



Marchantia. Lunularia. 

 Order 3. Anthocerotales. Horned liverworts. 

 Order 4. Jungermanniales. Leafy liverworts. Scale mosses. 



Porella. 

 Class II. Husci. Mosses. 



Order 1. Sphagna Us. Peat mosses. 



Sphagnum. 

 Order 2. Andreaales. 

 Order 3. Archidiales. 

 Order 4. Bryales. True mosses. 



Bryum. Mnium. Hypnum. 



Subkingdom III. PTERIDOPHYTA. Pteridophytes. 

 Fernworts. 



Class I. Filicineae. 



Order 1. Filicales. True ferns. 



Adiantum. Pteris. Aspidium. Asplenium. 

 Order 2. Hydropteridales. Water ferns. 

 Class II. Equisetineae. Horsetails. Scouring rushes. 



Equisetum. 

 Class III. Lycopodineae. 



Order 1. Lycopodiales. Ground pines. 



Lycopodium. 



Order 2. Selaginellales. Club mosses. 



Selaginella. 



Subkingdom IV. SPERMATOPHYTA. Seed plants. 



Class I. Gymnospermae. Gymnosperms. 

 Order 1. Cycadales. Cycads. 

 Cycas. 



