UNDERWOOD: REVIEW OF THE GENERA OF FERNS 275 
1830 : 
R. Brown (in Wallich: Pl. Asiat. rarior. I:) established the 
genus Matonia (16. pl. 16) based on Matonia pectinata ; the name 
Hypoderris is mentioned as follows: ‘ The beautiful ramification 
of the veins and their union from which the sorus originated in 
Matonia is not altogether peculiar to it. Among those genera of 
Polypodiaceae having an indusium one remarkable example occurs 
in a genus as yet undescribed (//yfoderris) which with an indusium 
not materially different from that of Woodsia has exactly the habit 
of Aspidium trifoliatum.” This is all the basis that exists for assign- 
ing the name of Robert Brown and affixing the date 1830 to the 
genus Z/Zypoderris, yet some people who accept this, reject other 
genera admittedly just as distinct which were elaborately described 
by their authors, and moreover referred to well-known species as 
types. 
1830 
Presl (Reliquae Haenkeanae, 1: 76. A. 12. f. r) established the 
genus Sotryopteris based on B. Mexicana, based, as afterwards 
stated by the author, on an erroneous label, as the plant figured is 
a species of the East Indian genus He/minthostachys. 
1831 
Hooker and Greville (Icones Filicum, A. 778) established the 
genus /amesonia based on J. pulchra from Peru. 
Summary 
The genera of ferns proposed prior to 1832 with their type 
species and synonyms arranged alphabetically are the following : 
(Genera with claims to validity are in bold face; synonyms are 
in SMALL CAPITALS; the type of each genus follows the date in 
Jtalics ; dead names are in Roman.) 
Achomanes Neck, 1790 (no type). 
Acrostichum L., 1753 (A. aureum). 
Actinostachys Wall., 1832 (Schisaca digitata). 
ADENOPHORUS Gaud., 1824 = Polypodium. 
Adiantum L., 1753 (A. capillus- Veneris). 
Alcicornium Gaud., 1826 (A. vulgare). 
| PrarvcERIUM Desv., 1827 (P. alcicorne). 
