166 



FBKNS ; BRITISH AND FOEEIGK. 



forked ;. costa excentric ; venules direct, free, their apices olavate, 

 the anterior one sporangiferons. JJeceptacZes oblong. Sori 



GeuusSl. — Portion of mature frond, under siJe. No. 1. 



terminal, elliptical, marginal. Indusimn oblong, attached lon- 

 gitudinally, hippocrepiform. 



1. D. lunulata, Besv. ; Hook. Gard. Ferns, t. 17. Didy- 

 moohlsena truncatula, J. 8m. Gat. Cult. Ferns (1857). 

 Aspidium truncatalum, 8w. Aspidium squamatiun, 

 Willd. ; (Flum. Fil. t. 56). Didymochlsena sinnosa, 

 Besv. ; Book. Oen. Fil. t. 8. Diplazinm pulcherrimum, 

 Badd. Fil. Bras. i. 59. — Malayan Archipelago and 

 Tropical America. 



•j-f Sori destitute of special indiisivm,, 



§ 6. SirutJiiopterecB. Fertile fronds contracted ; segments 

 revolute, forming a unieersal imdusiwii, enclosing arowded 

 pvMctiform sori. 



82. STRUTHIOPTERIS, Willd. 



Veirnation fasciculate, erect. Fronds pinnate or bipinnate 

 1-3 feet high. Veins pinnate ; venulSs free, the fertile pinnee 

 contracted, linear, with membranous, revolute, conniving mar- 

 gins, forming a universal indusium. Receptacles medial, base 



