Dec, 1911.] The Classification of Plants, VII. 419 



Phylum IX. BRYOPHYTA. Mossworts. 

 Class 28. Hepaticae. Liverworts. 

 Class 29. Sphagneae. Bogmosses. 

 Class 30. Andreaeae. Granite Mosses. 

 Class 31. Musci. True Mosses. 

 Class 32. Anthoceroteae. Hornworts. 



Phylum X. PTENOPHYTA. Fernworts. 

 Class 33. Filices. Ferns. 



Subclasses, Eusporangiatae. Primitive Ferns. 

 Leptosporangiatae. Modem Ferns. 

 Class 34. Hydropterides. Water-ferns. 

 Class 35. Isoeteae. Quillworts. 



Phykmi XL CALAMOPHYTA. Horsetails and Allies. 

 Class 36. Equiseteae. Horsetails. 

 Class 37. Calamariae (Fossil) Calamites. 

 Class 38. Sphenophylleae (Fossil) Wedge-leaf Calamites. 



Phylum Xn. LEPIDOPHYTA. Lycopods and Allies. 

 Class 39. Lycopodieae. Lycopods. 

 Class 40. Selaginelleae. Selaginellas. 



Phyllum XIII. CYCADOPHYTA. Cycads and AlKes. 

 Class 41. Pteridospermae (Fossil) Seed Ferns. 

 Class 42. Cycadeae. Cycads. 

 Class 43. Cordaiteae (Fossil). Cordaites. 

 Class 44. Ginkgoeae. Maiden-hair-trees. 



Phylum XIV. STROBILOPHYTA. Conifers and AlHes. 

 Class 45. Coniferae. Conifers. 

 Class 46. Gneteae. Joint -firs. 



Phylum XV. ANTHOPHYTA. Flowering Plants. 

 Class 47. Monocotylae. Monocotyls. 

 Subclasses, Helobiae. 



Spadiciflorae. 



Glumiflorae. 



Liliiflorae. 

 Class 48. Dicotylae. Dicotyls. 

 Subclasses, Thalamiflorae. 



Centrospermae. 



Calyciflorae. 



Amentiferae. 



Myrtifiorae. 



Heteromerae. 



Tubiflorae. 



Inferae. 



