AN ENUMERATION OP CULTIVATED PERNS. 



257 



H. elegans, Presl. Trichomanes elegans, Budge, Guian. 

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

 Ferns, t. 2. — G-uiana, Trinidad, Pacific side of Central 

 America. 



Sub-Oedee IV.— O SIUNDACEJ1. 



Sporangia globose, oval or oblong, opening vertically ; apex 

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

 is sometimes rudimentary only. 



Tjjibe I— SCHIZiEJE. 



Sporangia oval or oblong, opening on the exterior side, t>ro> 

 duced on contracted racemes, or on. 

 terminal or marginal spike-iike 

 appendices, or the fertile frond is 

 wholly contracted, or sub-con- 

 tracted. Apical ring complete. 



141. LYGODITJM, Sw. 



Vernation uniserial, distant 

 and sarmentose, or contigimna 

 and caespitose. Fronds scandent, 

 twining, extending to an inde- 

 finite length; pinna? conjugate, 

 palmate-lobed, pinnatifid or pin- 

 nate. Veins forked, free. Spo- 

 rangiferous spikelets marginal, 

 composed of two rows of imbri- 

 cate indusiate cysts, each cyst 

 containing an oval resupinate spo- 

 rangium attached by its inner 

 side, and opening longitudinally 

 on its outer side. 



1, L. palmatum, Sw. ; SchJe. 

 Fil. £.140; Lowe's Ferns, 

 8,2.74; Hook. Fil. Fxot. 

 t. 24. — North America. 



<3enus Ml.— Portion of fertile 

 fiend, under side. No. 2. 



