ICONES FILICUM SINICARUM 



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PLATE 31 



ADIANTUM NANUM Ching (fig. 6-9) 



POLYPODIACEAE 



A «V 



ADIANTUM NANUM Ching in Sinensia i: 9 (1929). 



Rhizome very short, small, scales stiff, ascending, dense, subulate, blackish; 



stip 



fronds 



glabrous, deep shining green above, bluish beneath; pinnae 3-5, rarely more, alter- 

 nate, petiolate (petioles 1-2 mm. long, persistent), spreading orbicular to sub- 

 triangular, rounded or shortly cuneate at base, entire, obscure undulate on the 

 outer margin, 2-4 mm. long, rarely longer; texhtre thick, stiff, coriaceous; veins fine, 

 free, principal veins 2, radiating from the apex of petiole, erect-ascending, each again 

 1-2-forked towards outer margin, translucent; sori solitary, one to each pinna, small, 

 inducium orbicular, entire, dark brown, coriaceous, attached to a rounded shallow 

 sinus of the crenature, springing from veins and parenchyma, and reaching down as far 

 as the centre of the pinnae. 



Distribution: Kwangsi. 



Plate 31. Fig. 6. Habit sketch (natural size). 7. A pinna, showing venation and sorus (x 8). 

 8. Scales from rhizome (x 48). 9. Sporangium (x 100). 





