226 



rOLYPODIACE2E. 



HAB. Arisau, leg. B. HAYATA et S. SASAKI, Jan., 1912. 



Asplenium planicaule WALL. 



HAB. Alison, ad 7000-6000 ped. alt., leg. B. HAYATA et 8. SASAKI, 

 Jan., 1912. 



Compared with a Japanese specimen so labelled in the herbarium at 

 Tokyo. 



Asplenium resectum SM. form, adiantifrons (Fig. 155). 



HAB. Arisan, ad 7000 ped. alt., leg. B. HAYATA et S. SASAKI, Jan., 1912. 



This form is so wide- 

 ly different from the or- 

 dinary one of A. resectum 

 that I thought it to be a 

 distinct species. But, ex- 

 amining closely, I have 

 found that there are many 

 transitional forms between 

 this and the ordinary one. 



a 



Fig. 133, Asplenium resectum SM. form, adiantifrons; a, the plant; b, a portion of a frond. 



This fern, therefore, though strikingly different from A. resectum,, will not 

 claim to be a distinct from the named species, nor even a variety of the latter. 

 Asplenium ritoense HAYATA sp. nov. (Fig. 156). Khizoma erectum? 

 brevissimum apice squamis dense obtectum, squamis ovato-lanceolatis 2 mm. 

 longis apice obtusis vel acuminatis basi leviter cordatis vel truncatis fer- 

 mgineo-nigris margine setulosis. Stipes l- 2 cm. longus frondibus brevior 

 l>asi plus minus squamifer toto lougitudine (basi excepto) alatus cum alis l mm. 

 latus. Frons elongato-triangularis 3 cm. longa 18 mm. lata pinnatifida apice 

 obtusa basi late truucata, segineutis infimis 5 mm. a se remotis late ovatis 



