Cyrtomium ASPIDIACEAE Dryopteris 



6. Cyrtomium Presl M^tMM (Kuang Chung Chiieh Shu; 

 Spike-like Fern Genus) 

 Leaves evergreen, coriaceous, pinnate: stipe scaly: veins anastomosing and form- 

 ing sub-hexagonal areolae enclosing 1-3 excurrent veinlets: sori multiseriate on either 

 side of costa, dorsal on veinlets: indusium large, orbicular, persistent or caducous. 

 11 species. (From the Greek, meaning "a bow.") 



Key to the Species 



Leaves terminating in a pinnatifid apex 1 . C. balansae 



Leaves terminating in a distinct end pinna. 



Margins thickened, entire, undulate 2. C. falcatum 



Margins serrulate, at least at the apex 3. C. fortumei 



1. Cyrtomium balansae (Christ) C. Chr. (DeV. F. 80). 30-70 cm. tall; fr. VI-XI; 

 margins aristate. China, Japan, Tonkin; locally in An., Ki. Stream bank. 



2. Cyrtomium falcatum (L. f.) Presl House Holly Fern (Ching 3:127). 15-80 cm. 

 tall; fr. IV-XI; leaves coriaceous. Asia, Africa; locally in Che., Ku. Rocks along 

 the coast. 



3. Cyrtomium fortunei J. Sm. Fortune's Holly Fern (Ching 3:126). 20-75 cm. tall; 

 fr. V-XI, leaves chartaceous. East Asia; locally in An., Che., Ki., Ku. Woods, 

 alleys. 



7. Dryopteris Adans. MW.M (Lin Chiieh Shu; Scaly Fern Genus) 

 Leaves tufted, of subcoriaceous texture, sometimes herbaceous: rhizomes short, 

 scaly: leaves pinnate to decompound; margins usually serrate or spinulose; stipe and 

 rachis often scaly; lamina without hairs; veins free, forked or simple; usually cata- 

 dromous in all divisions, except in the basal pair of pinnae: indusium usually large, 

 persistent, reniform, attached by a sinus, sometimes absent. 150 species. (Greek: 

 drys, oak, and pteris, fern.) 



Key to the Species 

 a. Lamina pinnate. 



b. With a large terminal pinna 1 . D. sieboldii 



bb. With a pinnatifid apex. 



c. Sori small, multiseriate. 



Stipe with only a few scales at base: rachis 



without scales Athyrium sheareri* 



Stipe and rachis scaly. 



Scales black 2. D. cycadiva 



Scales light brown 3. D. dickiusii 



cc. Sori large, in one row on either side of the costa. 



Pinnae oblong: indusia laciniate Athyrium macrocarpum* 



Pinnae falcate: indusia entire 10. D. decipiens 



aa. Lamina bipinnate to decompound. 



d. Lamina bipinnatifid to bipinnate. 



e. Pinnae of upper 1/4 to 1/2 of leaf soriferous. 



Sori bearing pinnae contracted, soon withering.. 5. D. lacera 



Sori bearing pinnae not contracted 6. D, uniformis 



ee. All pinnae soriferous. 



f . Without small rounded bullate scales on underside. 



* Two species of Athyrium wh'ch closely resemble Dryopteris are placed in this key to 

 help in their identification. 



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