THALLOPHYTA I. Schizophyta 2. Cyanophyceæ. Blue-green Algæ. 3. Schizomycetes. II. Dinoflagellata Peridineæ 4. III. Bacillariales 5. IV. Gamophyceæ I. Chlorophyceæ 6. Protococcoideæ. 7. Siphoneæ. 8. Confervoideæ. 9. Conjugatæ. 10. Charales. 11. Phæophyceæ. 12. Dictyotales. 13. Florideæ, Red Seaweeds. V. Fungi I. Phycomycetes 14. Oomycetes. 15. Zygomycetes. II. Mesomycetes 16. 17. III. Mycomycetes 18. 19. Additional group of Fungi, Lichenes. ARCHEGONIATÆ I. Bryophyta 20. Hepaticæ, Liverworts. 21. Musci, Mosses. II. Pteridophyta Vas. Cryptogams 22. Filices, Ferns. 23. Hydropterides, Rhizocarps. 24. Equisetales, Horse-tails. 25. Lycopodiales, Club-mosses. PHANEROGAMIA (Flowering Plants.) GYMNOSPERMÆ I. Cycadales, Cycads 26. II. Coniferæ 27. III. Gnetales 28. ANGIOSPERMÆ I. Monocotyledons 29. Liliifloræ. 30. Scitamineæ. 31. Gynandræ. 32. Fluviales. 33. Spadicifloræ. 34. Glumifloræ. II. Dicotyledons I. Monochlamydæ 35. Centrospermæ. 36. Protiales.