Hymenophyllum HYMENOPHYLLACEAE Vandenboschia 



tripinnatifid. China, Japan, Korea, Formosa; locally in Ki. On damp rocks. 



2. Mecodium Presl M%WM (Mei Mo Chiieh Shu; 

 Beautiful Membrane Ferns Genus) 



Epiphytic or petrophilous ferns: rhizomes filiform, widely creeping: leaves small 

 to medium sized, pinnately compound; margins entire: indusium bilabiate; receptacle 

 included. 100 species, mostly tropical. 



Key to the Species 



Lamina tripinnate to decompound 1. M. polyanthos 



Lamina bipinnate 2. M. wrightii 



1. Mecodium polyanthos (Sw.) Copel. {Hymenophyllum polyanthos Sw.) (DeV. F. 46). 

 Lamina 3-8 cm. long; fr. VTI-VIII; lower pinnae shortened, stipe slender, often 

 long. Cosmopolitan with many forms; locally in Ki. On damp rocks in gorges. 



2. Mecodium wrightii (v.d.B.) Copel. (Hymenophyllum wrightii v. d.B.) (DeV. F. 46). 

 Lamina 2-2.5 cm. long; fr. VII-VIII; stipe very short. China, Japan; locally in 

 Ki. On damp rocks in gorges. 



3. Gonocormus v.d.B. WWMU (Wei Mo Chiieh Shu; 

 Tiny Membrane Fern Genus) 



Minute epiphytic or petrophilous ferns: rhizome and stipe barely distinguishable; 

 both bear buds and branches freely; rhizome and base of stipe covered with reddish 

 brown hairs: lamina minute, reniform to orbicular, usually palmately lobed; margins 

 deeply cleft, crenate or incised; veins flabellate: indusium tubular, conspicuously dilated, 

 sunken into the leaves: receptacle exserted when mature. 3 species. 

 1. Gonocormus minutus (Bl.) v.d.B. (Trichomanes parvulum Hook., not Poir.) (Bd. 



F. 39; Ph. J. 67:56-57). Lamina 1cm. in diam.; fr. VII- VIII; lamina reniform 



to orbicular; margins deeply cleft. Siberia, China, Japan; locally in An., Ki. 



Damp rocks in mountain gorge. Fig. 6. 



4. Crepidomanes Presl faMMM (Wei Me Chiieh Shu; False Vein Fern Genus) 



Epiphytic or petrophilous ferns: rhizome filiform, widely creeping: leaves small 

 to medium sized, pinnately compound; margins entire, often undulate, ivith false 

 submarginal veinlets: indusium tubular, obconical: receptacle exserted. 12 species. 

 1. Crepidomanes latealatum (v.d.B.) Copel. (DeV. F. 47). Lamina 3-5 cm. long; fr. 



VII- VIII; rachis and stipe winged. China, Indo-China, India; locally in Ki. On 



damp rocks along mountain streams. 



5. Vandenboschia Copel. TitiWM (Shih I Chiieh Shu; 

 Rock-clothed Fern Genus) 



Epiphytic or petrophilous ferns: rhizome stout, 1-3 mm. thick, usually scaly, widely 

 creeping, often scandent: leaves distant, medium to large size, pinnate or pinnately 

 compound: indusium tubular: receptacle exserted. 24 species. 



Key to the Species 



Lamina pinnate 1. V. auriculata 



Lamina tripinnatifid 2. V. orientale 



1. Vandenboschia auriculata (Bl.) Copel. (Trichomanes auriuclatum Bl.) (H.S.F. 82). 



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