Lepisorus POLYPODIACEAE Drynaria 



Key to the Species 



a. Lamina linear, 1.5-2.0 mm. broad 1. L. leivisii 



aa. Lamina 0.6-3.0 cm. broad. 



Rhizome scales broadly ovate, obtuse: stipe long 2. L. macrosphaerus 



Rhizome scales narrow lanceolate to subulate. 



Sori medial 3 . L. thunbergianus 



Sori nearer costa 4 . L. oligolepidus 



1. Lepisorus lewisii (Baker) Ching (Ching 2:57). 4-8 cm. tall; fr. VII-X; margins 

 reflexed to costa. China; locally in An., Ki. Rocks. 



2. Lepisorus macrosphaerus (Baker) Ching var. asterolepis (Bak.) Ching (Ching 2:63). 

 15-20cm. tall; fr. IV-VII; sori medial. China; locally in An., Ki. Rocks. 



3. Lepisorus thunbergianus (Kaulf.) Ching (Polypodium lineare Thunb., non Burm., 

 nee Houtt.) (Ching 2 : 76). 6-18 cm. tall ; f r. V-XI ; lamina narrowly linear-lanceolate ; 

 scales few. Asia; locally in An., Che., Ki., Ku. Rocks. 



4. Lepisorus oligolepidus (Baker) Ching (Ching 2:70). 7-16 cm. tall; fr. IV-X; 

 lamina lanceolate; scales many. China; locally in An., Che., Ki. Rocks. 



10. Arthromeris J. Sm. %mWM (Chieh Chih Chiieh Shu; 

 Jointed-branch Fern Genus) 



Terrestrial or epiphytic ferns of moderate size: rhizomes thick, long-creeping, 

 covered with non-clathrate scales: stipe long, articulate, remote: leaves pinnate; pinnae 

 large, lanceolate, opposite, articulate to the rachis; margins entire, cartilaginous; lateral 

 veins distinct; minor venation indistinct; areolae with included veinlets; sori round, 

 one to many between the main veins, without paraphyses. 9 species. 

 1. Arthromeris lehmannii (Mett.) Ching (Polypodium lehmannii Mett.) (H.S.F. 369). 



15-60 cm. tall; fr. VII-IX; rhizome scales yellowish brown. China, Siam, Burma; 



locally in Ki. Stream banks, rocks. 



11. Polypodium Linn. Polypody ikWL'WM (Shui Lung Ku Shu; 



Water-dragon-bone-Genus) 



Epiphytic or petrophilous ferns: rhizomes creeping, scaly: leaves stipitate, articulate 

 to the rhizome; lamina pinnatifid to pinnate; pinnae adnate; veins forked and free; 

 or more often anastomosing to form a row of costal areolae, each with one simple 

 excurrent veinlet: sori exindusiate, round, terminal on the excurrent veinlet if areolae 

 are present. 75 species. (Greek: poly, many, and pons, foot; referring to the branched 

 rhizome.) 



Key to the Species 



Margins of lamina serrate: rhizome and rachis scaly 1 . P. amoenum 



Margins of lamina ciliate: rhizome covered with whitish bloom, turning 



black in dried specimens: scales few 2. P. niponicum 



1. Polypodium amoenum Wall. (Ching 2:99). 25-60 cm. tall; fr. V-Xl; leaves deeply 

 pinnatifid. China, India; locally in An., Ki. Rocks. 



2. Polypodium niponicum Mett. (Ching 2:98). 18-32 cm. tall; fr. IV-XII. China, 

 Japan; locally in An., Ki., Ku. Rocks. Fig. 30. 



12. Drynaria (Bory) J. Sm. Oak Fern WMU (Hu Chiieh Shu; 



Oak Fern Genus) 



Large epiphytic or petrophilous ferns: rhizomes stout, densely scaly, covered 



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