civ Appendix A. 
Hooker and Arnott, Contributions to the Flora of South 
America and the Pacific, pp. 129, 216, 302, t. .xcvi-cvi; 
Journ. Bot. i, p. 276, t. cxxxvii ; ii, pp. 19, 310 ; Comp. 
Bot. Mag. i, p. 29. 
1832 . The Enumeratio Filicum, by Greville and Hooker, recorded 
above under vols. i and iii of the ‘ Botanical Miscellany/ is not 
a mere enumeration, for it gives synonymy, citation of all authori- 
ties, habitats, and descriptions of new and imperfectly known 
species. Only thirteen genera are thus treated ; they are referable 
to Lycopodineae , Ophioglosseae , Marattiaceae, and Osmundaceae , 
beyond which the work was not continued. The number 
enumerated under each is, Psilotum , 2 sp. ; Tmesipteris, 1 ; Lyco- 
podium (including Selaginella) , 196 ; Ophioglossum, 17; Boiryo- 
pteris , 1 ; Helminthostachys , 1 ; Botrychium , 13 ; Maratiia , 10 ; 
Angiopteris , 1 ; Danaea , 5; Kaulfussia , 1 ; Osmunda , 12 ; Todea , 
3. Some idea may be gained of the great changes in the 
history of Ferns that have supervened during the half-century or 
more that has passed since the publication of the ‘ Enumeratio/ 
by a reference to the condition of some of the above genera 
in the most recent works which include them : — Lycopodium , now 
generically separated from Selaginella, consists of ninety-four 
species, a singularly close approximation to the number (93) 
given by Greville and Hooker for this section of the genus. On 
the other hand, of Selaginella (sect. Stachygynandrum in the 
Enum.), of which only 104 species were known in 1832, there 
are 333 described in Baker’s ‘ Handbook of Ferns and their 
Allies’ (1887). Of Ophioglossum , the species are reduced from 
27 to 10; of Botrychium , from 13 to 6 ; of Marattia , from 
10 to 7; and of Osmunda, from 12 to 6. On the contrary, the 
species of Danaea have risen from 5 to 11, and of Todea, from 
3 to 4. 
1831 - 42 . Supplement to the 4 English Botany ’ of the late 
Sir James E. Smith and Mr. Sowerby, by Sir W. J. Hooker 
and other eminent botanists. Three vols., 8vo, with coloured plates. 
Vol. 1 (1831), thirty-three plates and descriptions by Sir W. J. 
Hooker. 
Vol. 2 (1834), seventeen plates and descriptions by Sir W. J 
Hooker. 
Vol. 3 (1843), no plates. 
