. 998 CHARACTERS OF TRIBES AND GENERA, 
forked. Sori terminal, contiguous, confluent, forming a 
continuous marginal sorus. Indusiwm interiorly attached, 
continuous, forming with the margin a groove, containing 
the sporangia (as in Lindsea), 
Type. Lindsea lanuginosa, Wall. 
Illust. Hook. and Bauer. Gen. Fil., t. 102 ; Moore Ind. ` 
Fil, p. 22, fig. 1; J. Sm. Ferns Brit. and For, fig 
70, A 
Oss.—This genus was founded by me in 1841, on the 
Lindsea lanuginosa, of Wallich, a native of the Mauritius, 
Malayan Peninsula and Islands; to which I have since 
added two other species also natives of the same regions. In 
habit and general appearance Isoloma lanuginosa is similar 
to Nephrolepis ensifolia and N. hirsutula, but differing 
in the sori, being contiguous, forming a line on both mar- 
gins of the pinne, and in having a continuous indusium 
opening exteriorally, in that respect agreeing in technical 
character with Lindsca, but the articulated pinns and 
central costa is at variance with the character of that genus. 
Its affinity with the present group is also indicated by its 
having the white chalky dot, characteristic of Arthropteridec. 
. Sp. L lanuginosa (Wall) (v ei: I. Walkers (Hook.); 
I. divergens (Hook.). 
Sect. 5.—DmyYMocHLANER, 
Caudex arboroid. Fronds bipinnate, pinnæ and pinnules 
articulate with the rachis. 
120.—Dwrmocutana, Desv. (1811). 
Hook. Sp. Fil. 5. Aspidium sp. Sw. 
Vernation fasciculate and erect, subarbroid, Fronds 
bipinnate, 2 to 6 feet long, smooth, glossy; pinnules 
oblong elliptical, oblique, base truncate, subsessile, articu- 
