Volume 2, first published in 1910, contains systematic descriptions of fossil ferns.
12. Spenophyllales (continued from volume 1); 13. Psilotales; 14. Lycopodiales; 15. Arborescent lycopodiales; 16. Sigillaria; 17. Stigmaria; 18. Bothrodendreae; 19. Seed-bearing plants closely allied to members of the Lycopodiales; 20. Filicales; 21. Fossil ferns. 22. Marattiales (fossil); 23. Psaronieae; 24. Ophiglossales (fossil); 25. Coenopterideae; 26. Hydropterideae and Sagenopteris; 27. Genera of Pteridosperms, ferns, and plantae incertae sedis; Bibliography; Index.