16 F I L I C E S. 



natis; pinnis altemis divaricate ; pinnulis pinnatifidis oblongo-lanceo- 

 latis 'obtusis rigidis, laciniis ovate v. ovato-oblongis obtusis, margine 

 crenato incurvo; rhachi costaque paleaeeo-crinite ; venis costaformi- 

 bus pinnate; soris ad basim crenularum positis. 



Polypodium crinale, Hook. & Arn. Bot. Beech. Voy. p. 105. 



Hab. Sandwich Islands : in forests, on the island of Hawaii. 



Plant from 4 to 6 feet high, and rusty in its aspect. BootstocJc 

 tufted, Stipes half an inch in diameter at the base, erect, and sulcate 

 in front; the surface, when divested of its dense coating of long slen- 

 der brown palea, is of a pale straw-colour. Fronds large and bipm- 

 nate, with as many as 6 sori on the inferior, and only a solitary sorus 

 on the superior segments. Sori seated at the base of a crenule, near its 

 superior margin. 



27. Polypodium nemorale, Sp. Nov. 



P cmspitosum; stipitibus glabris teretibus basi paleaceis ; frondibus laxis 

 bipmnaiis; pmnis adscendentibus, wferioribus distantibus ; pmnuhs 

 oblongo-lanceolatis attenuatis sessiMus sursum decurrentibus profunde 

 pimiatifidis, lackms linearibus obtusis serrate; rhachi sursum pube- 

 scente; costa venisque furcate utrinque villosis; soris parvis ad basim 

 dentium solitariis. 



Hab. Tahiti, Society Islands ; and Tutuila, Samoan Islands: inha- 

 biting open places in mountain forests. 



Fronds lax and bipinnate, from 3 to 5 feet high, arising from a 

 short rootstock, with a stout, smooth, round stipes, about 18 inches 

 long, furnished with slender fimbriated pale^e at the base. PmncB 

 rather undulated and iiwlined to ascend; the inferior 2 or 3 pairs 

 distant: these, together with the deeply pinnatifid pinnules, contract 

 gradually into a finely serrate point. Segments 4 to 6 lines long, 

 II lines broad, linear, obtuse, and serrate. Primary and secondary 

 rhachis round and smooth on the under, and with a prominent rib on 

 the upper side, clothed with a close white pubescence; the costa and forked 

 veins villose on both sides. Sori small, distant, and biserial, with a single 

 sorus seated on the middle of the base of each tooth or serrature. 



