April, 1909.] The Classification of Plants, V. 495 



nonsexual zoospores, the sexual forms having true isogamous or 

 heterogamous gametes. 



Pleurococceae. 



Archimycetae. 



Protococceae. 



Hydrodictyeae. 



Monoblepharideae. 



Siphoneae. 



Conferveae. 



0. Phaeophyta. Brown Algae. 1,000 species. 



Mostly marine algae with chlorophyll and phycophaein and 

 with gametes, both isogamous and heterogamous, which are all 

 discharged from the gametangia. 



Phaeosporeae. 



Cyclosporeae. 



Dictyoteae. 



7. Rhodophyta. Red Algae, 2,000 species. 



Mostly marine algae with chlorophyll and phycoerythrin, 

 having nonciliated sperms and stationary eggs. 



Bangieae. 

 Florideae. 



8. Chareae. Stoneworts. 160 species. 



Filamentous, aquatic, green algae with globular antheridia 

 containing sperm-bearing filaments, the sperms being biciliate; 

 nonsexual spores absent. 



Chareae. 



9. Mycophyta. 47,000 species. 



Plants with a septate or nonseptate mycelium, destitute of 

 chlorophyll, with or without sexuality but never with typical 

 gametes. 



Zygomycetae. 



Oomycetae. 



Ascomvcetae. 



Laboulbenieae, 500 species. 



Teliosporeae. 



Basidiomycetae. 



10. Bryophyta. 17,000 species. 



Nonvascular plants with a definite alternation of generations, 

 the egg produced in an archegonium, and the sporophvte per- 

 manently parasitic on the gametophyte. 



Hepaticae. 



Sphagneae. 



Andreaeae. 



Musci. 



Anthocerotes. 



