Athyrium ASPLENIACEAE Diplazium 



6. Athyrium goering-ianum (Kunze) Moore (Ching 3:110). 35-80 cm. tall; fr. V-X; 

 pale linear scales along midrib on upper side. China, Japan; locally in An., Ki., 

 Ku. Wooded hillsides. 



7. Athyrium devolii Ching (DeV. F. 100). 75-100 cm. tall; fr. VHX; pinnae and 

 pinnules recurved. China; locally in Ki. Swampy land. 



8. Athyrium g-iganteum DeVol (DeV. F. 100). 140-170 cm. tall; fr. VIII-IX; basal 

 pair of pinnules opposite, appressed against rachis. China; locally in Ki. Swampy 

 land. 



9. Athyrium niponicum (Mett.) Hance (Asplenium niponicum Mett.) Japanese Lady 

 Fern (H.S.F. 227). 35-80 cm. tall; fr. V-XI; exceedingly variable fern. East 

 Asia; locally in An., Che., Ki., Ku. Wooded hillsides. 



3. Diplazium Sw. *£$HWM (Shuang Pao Chiieh Shu; Double-indusiate 



Fern Genus) 

 The important characteristic of this genus is that the linear indusia are placed 

 back to back, i.e. one on either side of a vein. Most of the species in this genus have 

 been named Athyrium or Asplenium by authors. The indusium in this genus is un- 

 stable: on some leaves nearly all the indusia may be doubled, while on another leaf 

 of the same species few if any are doubled; therefore, the keys to Athyrium and 

 Asplenium should also be consulted if in doubt. About 380 species. (From the Greek, 

 meaning " doubled," the sori being placed back to back on either side of the veinlets.) 



Key to the Species 



a Leaves simple 1 . £,. lanceum 



aa. Leaves pinnate to decompound. 



b. Lower pairs of veins uniting 6. D. esculentum 



bb. Veins all free. 



c. Laminae pinnate to bipinnatifid. 

 d. Pinnae petiolate. 



Pinnae falcate, with acute auricle at base 2. D. wichurae 



Pinnae lanceolate, without acute acuricle 3. D. mettenianum 



dd Pinnae sessile; stipe, rachis, and costa scaly. 



Lamina 2-6 cm. broad 5 . D. grammitoides 



Lamina 8-25 cm. broad 4 . D. japonicum 



cc. Laminae tripinnatifid to decompound. 



Stipe and lachis without scales; indusia fugacious 8. D. giganteum 



Stipe more or less scaly. 



Scales on stipe and rachis black 7. D. squamigerum 



Scales on stipe brown 9 . D. chinense 



1. Diplazium lanceum (Thunb.) Sw. (Bd. F. 174). 12-45 cm. tall; fr. IV-XI; stipe 

 5-18 cm. long. East Asia; locally in An., Che., Ki., Ku. Stream banks. 



2. Diplazium wichurae (Mett.) Diels (Asplenium wichurae Mett.) (H. S. F. 233). 35- 

 55cm. tall; fr. V-XI. East Asia; locally in Ki. Stream banks. Fig. 22. 



3. Diplazium mettenianum (Miq.) C. Chr. (DeV. F. 102). 30-60 cm. tall; fr. V-XI; 

 both margins cut into rounded serrate lobes. China, Japan; locally in An., Ki. 

 Stream banks. 



4. Diplazium japonicum (Thunb.) Bedd. (Asplenium japonicum Thunb.) (H. S. F. 

 235). 25-70 cm. tall; fr. IV-XI; lvs. broadly lanceolate. East Asia; locally in An., 

 Che., Ki., Ku. Hillsides. 



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