142 CHAKACTEKS OF TRIBES AND GENERA. 



This remarkable Fern has as yet only been found in the 

 island of Leyte, Philippines. 



Sp. A. articulata, /. Sm. {AcrosticJium Wilhesiaintm, Hook., 

 is probably the same ; it is a native of New Caledonia and 

 Society islands and shows that ^J. articulata has a wider 

 range than the island of Leyte). 



** Veins anastomosing in various '^oa'js, 



57. — Ctrtogoniuji. J. Sm. in^artf. (1841). 

 Acrostichum sp., auct.; Hool. S 'p. Fil. 



Vernation uniserial, sarmentum slender J^scandent. Fronds 

 pinnate, 1 to 2-| feet long, pinnte linear, 1 anoeolate, acumi- 

 nate, crenate-serrate, petiolate, articulate -svith the raohis. 

 Veins short, pinnate, venules anastomosing, the costal 

 areoles trigonal, larger than the exterior ones, which are 

 obliquely rhomboid. Fertile pinnm contracted. Beceptacles 

 confined to the concentrated venules, forming reticulated 

 lines of confluent sporang-ia. 



Type. AcrosticJium serratifoliuni, Mcrt. 



Illust. Schotts. Gen, Fil, t. 12 ; Hook, and Bauer, Gen. 

 Fil., t. 81, B ; Fie's Acrost., p. 94, t. 55, fig. 3. 



Obs. — Gyrtogoniiun, as originally characterised, included 

 species of Pixcilopteris, but as now restricted it is distin- 

 guished by the pinnas being articulate with the rachis. 



Sp. C. serratifolium {lEert.) {0. j'raxiiiijoliurn Hook, anil 

 Bauer.) ; C. scandens {Eatld. Fil. Bras., t. 18) (.1. Ead- 

 dianuni, K::e.) ; C. pinnata /. Sm. {Neiirocallis, Moore 

 Ind. Fil.) 



The two first are natives of Brazil, and the last of 

 India. 



