CHARACTERS OF TRIBES AND GENERA. 967 
the genera Schizolepton, Dictyoziphium, and Isoloma, which 
although agreeing in the technical character of the sori, 
are nevertheless widely distinct in vernation and habit, 
as will be seen on reference to their characters in their 
respective places. 
The species of this tribe are widely distributed, generally 
natives of the tropics of both the Eastern and Western 
hemispheres, a few extending to New Zealand in the 
South. 
148.—Linpsa#a, Dry. (1793). 
Hook. Sp. Fil. 
Vernation sarmentose, often short. Fronds distant or 
contiguous and sub-fasciculate, simple, pinnate, or bi-tri- 
pinnate; pinne and pinnules oblong, falcate, lunulate, 
upper margin fertile only; coste eccentric. Veins ra- 
diating, or unilateral forked; their apices (in the fertile 
segments) combined by a transverse, marginal receptacle, 
forming a linear, continuous or interrupted marginal 
sorus. Indusium linear, its outer margin free, usually 
shorter than the induseform margin. 
Type. Lindswa trapeziformis, Dryander. 
lllust. Hook. and Bauer, Gen. Fil., t. 63, A; Moore Ind. . 
Fil, p. 22; J. Sm. Ferns, Brit. and For., fig. 118; 
Hook. Syn. Fil., t. 2, fig. 20, a. 
Oss.—The fronds of some of the species of this genus 
vary from being simply pinnate, to bi- or even tri-pinnate, 
that authors have described the different forms as distinct 
. Species. They are chiefly tropical, L. trichomanoides being 
. a native of New Zealand. 
Ee * Fronds simple, cordate-reniform. : 
Sp. L. reniformis, Dry. (v v.) ; L. sagittata, Dry. (v v.) D. 
