AN ENUMERATION OP CULTIVATED FERNS. 240 
9. G. dichotoma, Hook. ; Lowe's Ferns. 8, t. 21. Mertensia 
dichotoma, Willd. ; Schk. Fil. t. 148; Lang, et Fiscli. 
Ic. Fil. t. 29. Polypodium dichotomum, Tlmnb. FI. 
Jap. t. 37. Gleichenia Hermanni, R. Br . — General 
throughout the Tropical and Subtropical regions of 
the Southern Hemisphere. 
10. G. furcata, Spreng. ; Lowe's New Ferns, t. 60. Acro- 
stichum furcatum, Linn. (Plum. Fil. i. 28). — "West 
Indies. 
11. G. pectinata, Presl. Mertensia glaucescens, Willd. 
Gleichenia Hermanni, Hook, et Grev. Ic. Fil. t. 14 
(nonR. Br.). — West Indies. 
12. G. pubescens, Kunth. Mertensia pubescens, II. B. K. 
Gleichenia immersa, Spreng. ; Hook, et Grev. Ic. Fil. 
t. 15. — Tropical America. 
13. G. cryptocarpa, Hook. Sp. Fil. 1, t. 6 A. — Chili. 
14. G. Cunninghami, Hew. ; Hook. Sp. Fil. 1, t. 6 B ; Hook. 
fil. FI. New Zeal. 6, t. 71. — New Zealand. 
Sub-Order III.— HYMENOPHYLLACEiE. 
Sporangia globose or oblate, furnished with a horizontal or 
sub-oblique ring. Fronds thin, membranaceous, pellucid. Sori 
marginal. Indusium an urceolate, sub-bivalved, extrorse, open 
cyst. 
137. HYMENOPHYLLTTM, 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. Receptacle short, included within 
the indusium. 
* Fronds glabrous. 
f Segments entire, plane or undulated. 
Stipes and rachis rarehj pilose. 
1. H. asplenioides, Sw.; Hook, lsi Cent. Ferns, t. 56. — 
Jamaica, Brazil. 
