CHAEACTEKS OF TKIBES AND C5ENEEA. 197 



Tbe sarmentum of D. Wallichii is described as being 

 hypog-eous. 



** Sori indasiate. 



Sect, 2. — AspiDEJS. 



Sori normally punctiform. Indusium orbicular peltate, 

 or lateral interiorly attached, and then more or less reni- 

 form, rarely calyciform. 



A. — Indusium calyciform. 



101.— Hypodeeeis, B. Br. (1830). 



Vernation uniserial sub-sarmentose. Fronds simple, 

 entire or trilobed, 1 to 2 feet long. Primary vei)is 

 costseform ; venules compound anastomosing. Becepiacles 

 punctiform, compital, included within a calyciform obscure 

 membraneous indusium. Sori round, irregular or oblique 

 biserial between the pi-imary veins. 



Type. Hypoderris Browiiii, J. Sni. 



Illust. 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. 



Obs. — 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 

 Bryomenes and Podopeltis, that without a very close exami- 

 nation of its sori it would pass for a species of Bryomenes, 

 allied to B. pilantaginea, 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 

 Bichsonlce, with which it has no affinity either in habit, 

 venation, or position of the sori. 



