polypodiace^e. 231 



bipmnate; the pinnm seated on a short petiole; the pinnules or ulti- 

 mate divisions linear-lanceolate and incisely serrate. Rhacliis and 

 costa in both kinds of fronds furnished with a narrow margin. 

 Sori numerous and small, seated in the sinuses of the serratures, 

 and furnished with a round indusium, which is about equal with 

 the margin. 



Our plant is nearly related to the Davallia alpina of Blume ; but 

 it differs in its tripinnate fertile fronds, the petiolate pinnae, and the 

 orbicular indusium. 



7. Humata botrychioides, Sp. Nov. (Tab. 32.) 



H. rhizomate repente squamoso; stipite gracili setoso-paleaceo ; frondibus 

 glabris coriaceis triangidari-ovatis ; sterilibus pinnatis, pinnis sessilibus 

 oblongo-lanceolatis inciso-pinnatifidis, laciniis oblongis obtusis crenu- 

 latis; fertilibus bipinnatis, pitinis infimis petiolatis oblongo-lanceolatis, 

 pimvulis linearibus lobato-crenatis ; costa marginata; venis incrassatis 

 furcatis; indusio coriaceo reniformi crenulas ozquantibus. 



Hab. Feejee Islands : at the elevation of 2,000 feet ; ascending the 

 trunks of trees. 



Bootstoch round, firm, and creeping, about the thickness of a goose- 

 quill, closely covered with fuliginous oblong-lanceolate scales, attached 

 by a point near their centre. Stipe Mender, setose-paleaceous ; that 

 of the fertile frond the longer. Fronds few, of a rigid texture, smooth 

 on both sides, triangular-ovate, or somewhat five-angled, and arising 

 from the points of spurs or branchlets. Sterile frond coriaceous, 

 pinnate, glossy on the upper side, which is of a dark green colour; the 

 under surface much paler and striated in appearance : pinnce sessile, 

 oblong-lanceolate in form, and incisely pimiatifid ; the segments oblong 

 and obtuse, more or less crenulate-dentate. Fertile frond the larger, 

 Upinnate, with subalternate pinnae ; the inferior pair petiolate, oblong- 

 lanceolate, the ultimate divisions so contracted that the parenchyma 

 is almost entirely wanting, except in the crenules, the terminal one 

 of which is bidentate : the whole frond has much the appearance of 

 the fertile spike of some species of Botrychium. Costa margined; 



