TAB. LVII. 



Aspidium (Poltstichum) triptebon, Kze. 



Caudice brevi erecto crasso squamis magnis ovatia acuminatis 

 paleaceis, stipitibus caespitosis semipedalibus ad pedalem 

 stramineis inferne squamosis, frondibus 1-1 £ ped. eubmem- 

 branaceis circumscriptione hastato-lanceolatis acuminatis 

 pinnatis, pinnis numerosis \\ unciam longis horizontalibus 

 sessilibua e basi oblique cuneata superne auriculata laneeo- 

 latis grosse serratis setoso-mucronatis subtus racbibusque 

 parce albo-paleaceis, infimis duabus suboppositis 4-6-un- 

 cialibus iterum pinnatis, soris plerieque subbiserialibus, in- 

 volucris parvis orbicularibus peltatis demum obsoletis. 



Aspidium tripteron, Kze. Bot. Zeit. 6. p. 509 ; Metten. Aspid. 

 p. 51. 



Hab. Island of Tsus Sima, Gulf of Korea, Wilford. Japan, 

 Goring ; Hakodadi, C. P. Hodgson, Esq. 



A species well distinguished among the Polystichum-group 

 of Aspidium by the flaccid and submembranaceous texture, 

 simply pinnate, except the lowest pair of pinna? ; these are 

 greatly elongated and again pinnate, resembling two ears, and 

 spreading so horizontally as to form in circumscription a has- 

 tate frond. In the more advanced state of the fructification, 

 the delicate involucre is so shrunk and concealed by the 

 copious capsules of the sori that the Fern resembles a Poly- 

 podium (§ Phegopteris.) 



Tab. LVII. Aspidium tripteron ; nat. size. Fig. 1 . Por- 

 tion of a pinna with young sori. f. 2. An old sorus, with 

 the involucre nearly obsolete ; — magnified. 



Cent. 2. i. 67. 



