CHARACTERS OF TRIBES AND GENERA. 357. 
Sixteen species are described in the “ Synopsis Filicum," 
and are widely distributed throughout the tropics and sub- 
tropics of both northern and southern hemispheres, In 
general the species are very local, S. dichotoma is, however, 
found in the West Indies, Tropical America, New Zealand, 
Australia, and the Polynesian, Malayan, and Mascarene 
Islands. = 
* Fronds simple, linear. 
Sp. S. australis, Gaud.; S. pusilla, Pursh. (v v.); S. 
tenella, Kawlf. ; S. fistulosa, Labill. ; S. pectinata, Sm. 
** Fronds forked, linear. 
S. incurvata, Schk.; S. bifida, Sw. 
*** Fronds bifid, dichotomously forked or flabelliform, 
segments broad, 
; S. rupestris, R. Br. (v v.); S. fluminensis, Miers. ; 
. S. Sprucei, Hook. MSS.; S. dichotoma, Sw. ; S. elegans, 
Sw. (v v.), Hook. Gard. Ferns, t. 54. 
Oss.—The latter species differs in the fronds being more 
or less divided, becoming entire and fan-shaped, and has 
been described by Martius as a distinct species under the 
name of S. flabellum. 
,210.—Acriosracays, Wall. (1828). 
Schizea, Hook, Syn. Fil. 
Vernation  uniserial, contiguous;  sarmentum short. 
Fronds linear, simple, stipitiform, compressed, triquetrous 
at the base, 9 to 18 inches high. Coste prominent, con. 
tinuous. Fertile appendices terminal, 6 to 12, digitate ` 
flabellate, 1 to 1} inch long, cristeform ; segments involute, 
