Woodwardia BLECHNACEAE-ASPIDIACEAE Thelypteris 



superficial or immersed, borne on veinlets parallel to midrib of tlie pinna; mdusia 

 opening towards the midrib (absent in two genera). 8 genera. 



1. Woodwardia Sm. fi)^WM (Kou Chi Chiieh Shu; Dog's-back Fern Genus) 



Large terrestrial ferns: leaves pinnate or more often bipinnatifid; fertile and sterile 

 leaves alike; veins anastomosing to form a series of areolae along the costa: sori in 

 some species sunken in cavities of the leaf, linear, arranged in rows parallel and con- 

 tiguous to costae of pinnae and pinnules; indusium opening towards the costa. 10 

 species. (Named for Thomas J. Woodward, 1745-1820, an English botanist.) 

 1. Woodwardia japonica (L. f.) Sm. (H. S. F. 188). 60-125 cm. tall; fr. IV-XI; seg- 

 ments of the same length on either side of costa. China, Japan, Formosa; locally 

 in An., Che., Ki., Ku. Wooded hillsides. Fig. 23. 



23. WOODSIACEAE Ching $j^£r (Yen Chiieh K'o) 



Small petrophilous ferns: rhizome erect, covered with broad thin scales: leaves 

 clustered, pinnate to tripinnatifid, often covered with chaffy scales and jointed hairs; 

 veins free: stipe not articulate to rhizome, but often with a prominent joint in the 

 stipe below the basal pair of pinnae: sori round, borne at the end of a veinlet; in- 

 dusium inferior, in the form of a membranous sac with an apical opening, or cleft 

 into laciniate segments, or reduced to merely a tuft of crisped hairs around the base. 

 One genus. 



1. Woodsia R. Br. WlWM (Yen Chiieh Shu; Cliff Fern Genus) 



Characters of the family. 38 species. (Named for Joseph Woods, 1776-1864, an 

 English botanist.) 



Key to the Species 



Leaves glabrous: indusia globose, sac-like with non-ciliate segments. 1. W. manchuriensis 

 Leaves more or less pubescent: indusia cleft into narrow segments .. 2. W. polystichoides 



1. Woodsia manchuriensis Hook. (H. S. F. 48). 12-38 cm. tall; fr. VII-VIII; stipe 

 not articulate. East Asia; locally in An., Ki. Crevices of rocks. Fig. 24. 



2. Woodsia polystichoides Eaton (H. S. F. 48). 15-40 cm. tall; fr. VII-X; stipe arti- 

 culate near base of blade. China, Japan, Manchuria; locally in Ki. Crevices of 

 rocks. 



24. ASPIDIACEAE Gray M^M® (Lin Mao Chiieh K'o) 



Terrestrial ferns with erect, oblique or creeping rhizomes covered with scales or 

 hairs: stipe usually scaly or pubescent; leaves pinnate to pinnately decompound, stipi- 

 tate; pinnae not articulate to the rachis; stipes not articulate to rhizome; lamina often 

 pubescent, especially on upper side along costa, or scaly beneath; veins free or anas- 

 tomosing: sori dorsal to subterminal on veins, round or sometimes oblong, usually 

 with indusia; indusium orbicular and attached by center, or reniform and attached by 

 a deep sinus or absent. 58 genera. 



Key to the Genera 



a. Lamina and stipe pubescent, 

 b. Veins free. 



c. Sori exindusiate. 



Sori oblong 2 . Leptogramma 



Sori round 1 . Thelypteris 



46 



