254 



POLYPODIACE^E. 



The venation of our fern is more finely reticulated than that figured in HOOK'S 

 work, but more loosely reticulated than that figured in BEDDOME'S. 



Polypodium tenuissimum HAYATA sp. nov. (Fig. 178). Rlu'zoma 

 breve tenue erectum apice dense squamatum apice stipites csespitosum 

 gerens, squamis tenuissimis fuscis oblongo-lanceolatis usque l mm. longis. 

 ^ mm. latis ; apice obtusis bisetosis basi rotundatis vel leviter cordatis. 

 Stipes brevissimus 1-2 cm. longus ad apicem rhizomatis csespitosus ad basin 



Fig. 178, Polypodium tenuissimum HAYATA ; a, the plant ; b, a scale on the rhizome ; 

 c, another smaller one; d, a portion of the frond. 



