CHARACTERS OF TRIBES AND GENERA, 
the Bebe or erect nature of the rhizome, and the 
. more or less elevation of the node of articulation, and in 
the position of the sori. The following are admitted in 
the “Synopsis Filicum” as distinct species. 
: Species :—O. neriiformis, Cav. (yy.)*; O. musæfolia, 
Kunze (Bedd. Ferns, Brit. Ind. pl. 264); O. articulata, 
Cav. (v v.) ; O. nodosa, Willd. (v v.) ; O. Wallichii, Hook. ; 
O. Cumingii, J. Sm. 
~ The genus is widely distributed, being found in the 
region of the Himalaya, Malay Archipelago, and Philip- 
pine Islands, as also in the West Indies and Tropical 
America. O. neriiformis is a peculiar Fern, differing from 
the rest of the genus in having erect frutescent branching ` 
stems, about half an inch in diameter, and rising to the - 
; height of from four to six feet, bearing lateral whorls of 
Simple fronds. It may be viewed as the only representa- 
tive of a shrub among Ferns. It is found throughout the : 
tropics of America and India, and in the Malay and Pacific z 
Store 
Tribe 2.—DAVALLIEA, J. Sm. (Plate 2.) 
“Veins free. Sori terminal, marginal, punctiform. In- - 
: Jaian forming a more or less complete cyst, opening 
; E x 
... Oss.—In the “ Species Filicum,” 112 species of Dorsilia ~ 
are enumerated, which, in the “Synopsis,” are reduced to - 
| Seventy-nine. This number consists of species both with 
articulate and adherent vernation ; the latter consequently S 
comes under the division Desmobrya. About forty species ` 
have articulate vernation, and are comprised under the 2 
* These letters indicate that the species have been tainted o at 3 
i Se recorded i in * ME : Brita and due. 
