CHAKACTEK3 OF TRIBES AND GENERA. 95 



three sections, namely, ISupliymatodes, Pleuridinm, and 

 Vryiiarui. Under Flcuridium lie places sixteen species, 

 which although they all agree in having comijonnd vena- 

 tion and compital sori, nevertheless as they differ in habit, 

 I restrict the species to those bearing the above character. 



* Sori ohlique uniserial. 

 P. crassifolinm, {Liiin.\ (v v.) ; P. albo-punotissimum 

 (Linden's Cat.) (v v.) ; P. crassinorvum {Bl.) (v v.) ; P. 

 vulcanicum {Bl.) 



** Sori ohliqiie hiserial. 



P. rupestre (Bl.) (v v) ; P. triquetrum (BI.) (v v.) 

 The two first are natives of West Indies and Tropical 

 America, the others of Malay and Philippine Islands. 



13. — Campylonedrum, Presl (183G). 



CijriopJdehiu'iii, B. Br. ; J. Sm. Gen. FiL, IS-il ; Poli/podium, 



sp. auct. Ilouk. Sp Fil. 



Surculum short, ca3spitose, or elongated, often sub- 

 hypogeous. Fronds simple, linear lanceolate or broad 

 elliptical, or pinnate, firm, rigid, 1 to 2 feet high. Primary 

 veins costajform or undefined, elevated, or internal and 

 obscure. Vemdes arcuately or angularly transversely anas- 

 tomosing, producing two or more excurrent free veinlets, 

 uniform, or sometimes irreg-ular. Pcaeplacles punctiform, 

 terminal, or medial on the free veinlets. Sori round, 

 oblique biserial, or irregular, destitute of scales. 



Type. Polypodiiim repens, Linn. 



Illast. — Hook, and Bauer., Gen. Fil. t. 71 A. Moore, Ind. 

 Fil. p. 60 ; J. Sm. Ferns, Brit, and For., fig. 27 ; Hook. 

 Syn. FiLt. 5, fig. 48,j. 



Ocs. — This genus consi.sts of about a dozen described 



