POLYPODIACE^. 



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29. OLFERSIA, Baddl 



1. Olfersia Corcovadensis, Raddi. 



0. stipitibus glabris sulcatis; frondibus pinnatis ; pinnis alternis, steri- 

 libus subsessilibus ovato-lanceolalis acuminatis integris apice falcatis, 

 fertilibus linearibus brevi-petiolatis. 



Olfersia Corcovadensis, Raddi, Plant. Brasil. p. 7, t. 14 j Gaud. Bot. Freyc. Voy. p. 

 308; Hook. Gen. El. t. 79 (opt.). 



Hab. Corcovado, Rio Janeiro, Brazil : on trees. 



Stipes of both kinds of fronds long, smooth, shining, semiterete, and 

 channeled in front. Sterile fronds glabrous, impari-pinnate. Pinnae 

 alternate, subsessile, ovate-lanceolate, acuminate and falcate at the apex, 

 with an obliquely cuneate base and slightly repand-crenate margin. 

 Fertile pinnae contracted, linear, attenuated, and seated on a short 

 petiole. 



30. ACROSTICHUM, Presl. 



(Acrostichi Spec. Linn. & Auct.) 

 1. ACROSTICHUM RETICULATUM, Kaulf. 



A. rhizomate crasso repente dense paleaceo ; stipitibus sulcatis hasi palea- 

 ceis, fertili longiore; frondibus coriaceis oblongo-lanceolatis obtusis 

 submarginatis basi attenuatis. 



Acrostichum reticulatum, Kaulf. Enum. Fil. p. 64. 



Hab. Sandwich Islands ; frequent and usually terrestrial. 



Rootstock short, thick, creeping, and densely paleaceous; the palege 

 oblong, attenuate, and fimbriated. Stipes firm, smooth, and semi- 



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