74 F I L I C E S. 



13. Elaphoglossum Lingua. 



E. rhizomate repente paleaceo; stipitibus elongatis glabris subtetragonis 

 sulcatis; frondibus glabris rnarginatis ovato-lanceolatis obtusis basi 

 attenuatis; fertili anguste elongato-lanceolata ; venis parallelis fur- 

 catis. 



Acrostichum Lingua, Raddi, Plant. Brasil. p. 5, t. 15, f. 4. 

 Olfersia Lingua, Presl, Tent. Pterid. p. 235. 



Hab. Organ Mountains, Brazil. 



Stipes of the sterile and fertile fronds nearly equal in length, that 

 of the fertile a little the longer, rather slender, quadrangidar and 

 channeled in front, from 12 to 15 inches in length. Sterile frond 

 about 8 inches long and 3 inches broad ; the fertile one narrower ; 

 both of them slightly attenuate at the base. 



In all our specimens of this species, the stipes are longer than in 

 Raddi's figure; but, making due allowance for the effects of local 

 causes, we cannot doubt the identity of the two plants. 



14. Elaphoglossum gorgoneum. 



Acrostichum gorgoneum, Kaulf. Enum. Fil. p. 63. 

 Olfersia gorgonea, Presl. Tent. Pterid. p. 235. 



Hab. Sandwich Islands : terrestrial, in mountain forests of Kauai. 



The point of the fronds of this species is not always obtuse, as 

 described by Kaulfuss, but in many instances acute or shortly acu- 

 minate. It may also be remarked, that the apices of the parallel 

 venules are united by a transverse intramarginal vein; in which 

 particular it accords with the genus Acmiiapteris of Presl : this, how- 

 ever, has excurrent free veinlets, terminating between the junction of 

 the parallel venules and the margin. In our plant, the free marginal 

 veinlets are wanting; and in that respect it resembles the genus 

 Olfersia of Raddi; yet with neither of these does it so well agree, as 

 with the genus to which we have here referred it. 



