226 



TOLYrODIACEZE. 



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



Asplenium planicaule WALL. 



HAB. Arisau, ad 7000-6000 ped. alt., leg. B. HAYATA et S. SASAKI, 



Jsin., 1912. 



Compared with a Japanese specimen so labelled in the herbarium sit 



Tokyo. 



Asplenium resectum SM. form, adiantifrons d'ig- 155). 

 HAB. Arissm, 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- 

 J0!^ amiuiug closely, I have 

 found that there are many 

 transitional forms between 

 this and the ordinary one. 



a 



Fig. 155, Asplenium resectum SM. form, wlutntifrons ; a, the plant; b, a portion of i 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). llhizoma erectum ? 

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

 longis apice obtusis vel acumiuatis basi leviter cordatis vel truucatis fer- 

 rugineo-nigris margiue setulosis. Stipes 1^2 cm. longus frondibus brevior 

 basi plus minus squamifer toto longitudine (basi excepto) alatus cum alis 1|- mm. 

 latus. Prous elongato-triangularis 3 cm. louga 18 mm. lata pinnatifida apice 

 obtusa basi late truncata, sogim.-ntis inmuis 5 mm. a so romotis lato ovatis 



