134 



FEENS : BRITISH AND FOREIGN. 



fertile decompound ; segments forked, linear ; margins revoLite, 

 membranaceous, conniving, indusiform. Veins transversely 

 elongated, distantly anastomosing. Sporangia occupying t he- 

 transverse venules, superficial, large, disposed in a simple series, 

 constituting two linear sub-parallel sori. 



1. C. thalictroides, Brongn.; Hook. Gen. Fit. 12; Lowe's 

 Ferns, 2, t. 66. Ellobocarpus oleraceus, Kaulf. Par- 

 keria pteridioides, Hook. Ex. FLt. 147 ; Hook, et Grev* 

 Ic. Fil. t. 97. Ceratopteris Parkeri, J. 8m. Gen. FIL 

 1841. Tropics. 



TEIBE YI.-PHEGOPTERIDE^I. 



Sori punctiform, intra-margiaal or rarely on marginal dents,, 

 naked or each furnished with a special indusiurn, which is 

 either peltate or lateral and interiorly attached, rarely calyci- 

 form ; or the margin of contracted fronds revolute, forming an 

 universal indusium ; or the dents of the margin reflexed and 

 indusiform. 



* Veins anastomosing in various ways. 

 f Sori naked. 



1. Dictyopterice. Primary veins costceforvi, generally well 

 defined. Sori punctiform, or linear, in oblique or transverse 

 rows or lines, or rarely reticulated letiveen the primary veins. 



61. DRYOMENIS, Fee; J. Sin. 



Vernation uniserial, contiguous or subfasciculate, sub- 

 hypogeous. Fronds simple, pinnatifid or pinnate, smooth.. 



Genus 61. Portion of frond. No. 1. 



