AN ENUMERATION OF CULTIVATED FERNS. 257 



1. H. elegans, Presl. Trichomanes elegans, Eudge, Guian. 

 t. 35 (in part) ; Hook. Gen. Fil. t. 108 ; Hook. Gard. 

 Ferns, t. 2. Guiana, Trinidad, Pacific side of Central 

 America. 



SUB-ORDER IV. Q SMUNDACEJE. 



Sporangia globose, oval or oblong, opening vertically ; apex 

 striated, the strias forming a more or less complete ring, which 

 is sometimes rudimentary only. 



Sporangia oval or oblong, opening on the exterior side, pro- 

 iuced on contracted racemes, or on 

 terminal or marginal spike-like 

 ippendices, or the fertile frond is 

 vholly contracted, or sub-con- 

 tacted. Apical ring complete. 



141. LYGODIUM, 8w. 



Vernation uniserial, distant 



tid sarmentose, or contiguous 

 caaspitose. Fronds scandent, 

 I wining, extending to an inde- 

 iinite length ; pinnaa conjugate, 



)almate-lobed, pinnatifid or pin- 



late. Veins forked, free. Spo- 

 angiferous spikelets marginal, 

 Composed of two rows of imbri- 



ate indusiate cysts, each cyst 



ontaining an oval resupinate spo- 



angium attached by its inner 

 >jide, and opening longitudinally 



n its outer side. 



. L. palmatum, 8w.; Schk. 

 Fil. ^.140 ; Lowe's Ferns, 

 8, t. 74 ; Hook. Fil. Exot. 

 t- 24. North America. 



m Genus 141. Portion of fertile 



* frond, under side. No 2. 



