CHARACTERS OF TRIBES AND GENERA, 197 
The sarmentum of D. Wallichii is described as being 
hypogeous. 
** Sori indusiate. 
Sect, 9.—ASPIDEZ. 
Sori normally punctiform, Indusium orbicular peltate, 
or lateral interiorly attached, and then more or less reni- 
form, rarely calyciform. 
A.—Indusium calyciform. 
101.—Hypoperris, R. Br. (1830). 
Vernation uniserial sub-sarmentose. Fronds simple, 
entire or trilobed, 1 to 2 feet long. Primary veins 
costeform ; venules compound anastomosing. Receptacles 
 punctiform, compital, included within a calyciform obscure 
membraneous indusium. Sori round, irregular or oblique 
biserial between the primary veins. 
Type. . Hypoderris Brownii, J. Sm. 
Tilust. Hook. and Bauer, Gen. Fil, t. 1; Hook. Gard. 
Ferns, t. 24; Moore Ind Fil. p. 83 A. ; J. Sm. Ferns, 
Brit. and For, fig. 72 ; Hook. Syn. Fil., t. 1, fig. 10. 
Oss.—This genus was, until lately represented by a 
-single species, as yet found only in the Island of Trinidad, 
West Indies. It is so similar in habit and venation with 
Dryomenes and Podopeltis, that without a very close exami- 
nation of its sori it would pass for a species of Dryomenes, 
allied to D. plantaginea, but the sori are found to be 
furnished with a small membraneous calyciform indusium, 
similar to that of Woodsia. ` 
In the “Species Filicum” it is placed in the Tribe `` 
|  Dicksonie, with which it has no affinity either in wer SE l 
‘ — or _ of the sori. E 
