POLYPODIACEyE. 3 



3. P L Y P D I U M, Linn., J. Sm. 



(Adenophorus, Gaud. Marginaria, Bory.) 



* Ctenopteris, Presl, J. Sm. 



1. POLYPOD1UM PSEUDO-GRAMMITIS, Gaud. 



Polypodium pseudo-grammitls, Gaud. Bot. Freyc. Voy. p. 345 ; Hook. & Arn. Bot. 



Beech. Voy. p. 103, t. 21, f. B. 

 Grammitis tenella, Kaulf. Enum. Fil. p. 84. 



Hab. Sandwich Islands : on trees. 



The linear, slightly undulated fronds of this species, when growing 

 in shady localities, are " very tender and membranaceous," as stated 

 in the Botany of Beechey's Voyage ; but in open and exposed loca- 

 lities, they are rigid and coriaceous. 



2. Polypodium subspathulatum, Sp. Nov. (Tab. 1.) 



P. rhizomate caispitoso ; frondibus paucis, sterilibus spatliulatis stipitati* 

 integris coriaceis glabris, fertilibus lineari-lanceolatis basi attenuate 

 margine cum stipite sparsim setosis ; venis furcatis; soi'is biserialibw 

 distantibus subimmer sis fere ovalibus ; sporangiis echinatw. 



Hab. Tahiti, Society Islands : on trees, in mountain forests. 



Rootstoch ccespitose, short, and squamose. Fronds few and very 

 dissimilar in form; the sterile one, including the short stipe, 1 to 1& 

 inches high, spatulate in form and destitute of setae ; the fertUe, 4 to 5 

 inches in length, linear-lanceolate, the base attenuating on a slender 

 stipe of about an inch in length, which, with the margin of the frond, 

 is sparsely beset with short and brown setce. Veins slender and forked, 

 partially visible to the naked eye on the upper side. Sort of a 

 slightly oval form, subimmersed, distant, confined to the upper half of 

 the frond, and forming a single line equidistant between the costa 

 and margin ; the sporangia echinate. 



