AX ENDMEEATION Of CULTIVATED FBENS. 249 



P. G. dichotoma, Hook. ; Lowe's Ferns, 8, t"21. Mertensia 

 dichotoma, Willd. ; Bchlc. Ml. t. 148 ; Lcmg. et Fisch. 

 Ic. Fil. t. 29. Eolypodiiim dichotomum, Thunh. Ft 

 Ja/p. t. 87. Gleicheiiia Hermanni, B. Br. — General 

 throughout the Tropical and Subtropical regions of 

 the Southern Hemisphere. 



10. G. forcata, Spreng. ; Lowe's New Ferns, t. 60. Aoro- 



stichum. furcatum, I/tim. {Plmn. Fil, t. 28). — West 

 Indies. 



11. G. pectinata, Presl. Mertensia glaucescens, Wi'Vd. 



Gleichenia Hermanni, Sooh. et 6reo. Ic. Fil. t. 14 

 {nonji. Br.). — West Indies. 



12. G, pubescens, Kunth. Mertensia pubescens, H. B. K. 



Gleichenia immersa, Spreng. ; SooTc. et Qrev. Ic. Fil. 

 t.,15. — Tropical America. 



13. G. cryptocarpa, Hooh. 8p. Fil. 1, t. 6 A. — Chili. 



14. G. Cunninghami, Hew. ; Hooh. Sp. Fil. 1, t.6B; Hook. 



fil. Fl. New Zeal. 6, t. 71.— New Zealand. 



Sub-Okder liL-HYMENOPHYLLACEJi;. 



Sporangia globose or oblate, furnished with a horizontal or 

 sub-oblique ring. Fronds thin, membranaceous, pellucid. Sort 

 marginal. Indttsium an urceolate, sub-bivalved, extrorse, open 



cyst. 



137. HYMENOPHYLLUM:, Sm. 



Vernation uniserial and sarmentose. Fronds varying from 

 simple to decompound-multifid, membranaceous and pellucid, 

 smooth, or bearing Simple, forked, or stellate hairs. Veins 

 simple or forked, free. Sori terminal. Indusium short, urce- 

 olate, bilabiate or bivalved. Beceptdcle short, included within 

 the indusium. 



* Fronds glabrous. 



f Segments entire, plane or undulated. 

 Stipes and rachis ra/rely pilose, 



1. H. asplenioides, Sw.; Hooh. 1st Cent. Ferns, t. 56. — 

 Jamaica. Brazil. 



