Thelypteris 



ASPIDIACEAE 



Tlielypteris 



cc. Sori with indusia. 



With few or no scales at base of stipe 1 . 



Base of stipe covered with bright reddish-brown scales .. 3. 



bb. Lowest pairs of veinlets of adjoining segments uniting 4. 



aa. Lamina not pubescent; stipe and rachis usually bearing few to 

 many chaffy scales 



d. Indusium orbicular, attached by center. 



Veins fiee 5. 



Veins anastomosing to forms a series of areolae 6. 



dd. Indusium reniform, attached by deep sinus. 



Rhizome short: leaves tufted, usually catadromous . . 7. 

 Rhizome creeping: leaves distant, anadromous 8. 



Thelypteris 



Hypodematium 



Cyclosorus 



Polystichum 

 Cyrtomium 



Dryopteris 

 Rwmohra 



1. Thelypteris Schmidel ^MHII (Chin Hsing Chiieh Shu; 

 Golden Star Fern Genus) 



Rhizome usually widely creeping and leaves distant: lamina bipinnatifid, rarely 

 tripinnatifid to decompound; basal pinnae seldom the largest, often reduced; pinnae 

 linear-lanceolate, usually sessile; veins free; glands common; stipe long, sparsely scaly 

 or without scales; blades usually pubescent on both surfaces; hairs simple, especially 

 copious along rachis and costa: sori small, round; indusium usually present, reniform, 

 often fugacious; sporangia setose in some species. 500 species. (An old generic name.) 



Key to the Species 



a. Sori exindusiate. 



Lamina pinnate to bipinnatifid; rachis winged 1. T. decursive-pinnata 



Lamina tripinnatifid to tripinnate 8. T. uliginosa 



aa. Sori with indusia, sometimes fugacious, 

 b. Leaves bipinnatifid. 



c. Lower pinnae gradually shortened. 



Lamina 6-10 cm. broad 2. T. nipponica 



Lamina 15-30 cm. broad 3. T. subocthodes 



cc. Lower pinnae not shortened, or only lowermost pair 

 slightly so. 



d. Ultimate segments serrate; veins forked 6. T. laxa 



dd. Ultimate segments entire; veins simple. 

 Stipe castaneous. 



Under-surface setose; basal pinnae longest: 



indusia hirsute 5 . T. japonica 



Under-surface glabrous; basal pinnae slightly 



shortened : indusia glabrous 7. T. chinensis 



Stipe stramineous 4 . T. glanduligera 



bb. Leaves tripinnatifid to tripinnate. 



Leaves large (70-100 cm. tall): indusia glabrous 9. T. oligophlebia 



Leaves medium sized (30-50 cm. tall): indusia hirtellous. 10. T. hattorii 



1. Thelypteris decursive-pinnata (van Hall) Ching (Nephrodium decursivepinnata 

 (van Hall) Baker) (H. S. F. 259). 20-70 cm. tall; fr. V-XI; pinnae adnate. East 

 Asia; locally in An., Che., Ki., Ku. Hillsides. 



2. Thelypteris nipponica (Fr. & Sav.) Ching (Dev. F. 60). 30-40 cm. tall; fr. VII- 

 VIII ; anterior and posterior basal veins run to margin some distance above sinus. 

 East Asia; locally in Ki., Ku. Wooded hillsides. 



3. Thelypteris subocthodes Ching (Fa. B. 6:305). 6-12 dm. tall; fr. V-XI; basal 



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