128 CHARACTERS or TRIBES AND GENTRi. 



glossum, but are distinguished by the veins beinc;- connected 

 at the margin by a continuous zigzag or straight rein, 

 similar to that of the genus Oljersia, but which has pinnate 

 fronds, and also differs in tho nature of its vernation. 



Sp. A. nervosa {Bory) (v v.) (A. suhdiaplianum, Hook, 

 and Grev.) ; A. long'ifolia {Jacq.) (v v.) ; A. gorgoneum 

 (Kavlf.) 



42.— Htmexodium, Fee (1844). 

 Dicti/oglossnm, J. Sm., 184G ; Acrostkhum sp.. Hook. Sp. Fil. 



Vernation fasciculate, decumbent, thick. Fronds con- 

 tiguous, stipitate, simple, entire, from 1 to 2 feet in length, 

 broad elliptical, smooth or squamiferous, subcoi'iaceous. 

 Veiiis uniform, reticulated, forming elongated oblique 

 areoles. Fertile fronds the same shape as the sterile ones, 

 but smaller. 



Type. Acrosticliiini erinitum, Linn. 



Illust. Hook, and Grev., t. 1 ; Hook. Fil. Exot., t. 6 ; 

 Moore Ind. Fil., p. 6 A. ; J. Sm., Ferns Brit, and For., 

 fig. 31. 



Obs. — The reticulated venation distinguishes this genus 

 from the two preceding ; it consists of three known species, 

 two being natives of the West Indies and one of the 

 Sandwich Islands. 



Sp. H. crinitum {Linn.) (v v.) ; H. reticulatutn {Kaulf.) 

 (v V.) ; H. pachyphyllum {Kze.^:. 



43.— Anetium, SpJitg. (1840). 

 Hemioniiis, Hook. Sp. Fd. Antrophijum Fee. 

 Vernation uniserial, sarmentum slender. Fronds distant 

 eimple, oblong elliptical, acuminate, 6 to 20 inches loner. 



