264 CHAEACTEES OF TEIBES AND GESEEA. 



definite fronds, and the other scandent and indefinite, the 

 latter forming the genus Steiwloma of Fee. 



* Fronds Jefinite, not scandent. 



Sp. 0. tenuifolia {Sw.) (v v.). 



Obs. — This is a widely spread species, being found in 

 India, Malayan, and Polynesian Islands, also the Sandwich 

 Islands, the latter being the nearest approach to the con- 

 tinent of America, where it has not yet been found. 



0. bifida (Kaidf.) ; 0. niicrophylla {Siv.) ■ 0. chinensis 

 {Linn.) ; 0. retusa {Gav.) ; 0. clavata {Sw.) 



** Fronds scandent (Stenoloma, Fee.). 

 0. divarioata {ScJdecht.) {D. ScJdechtendahlii, Hooh.) ; 0. 

 aciileata (Sw.) {v v.) ; 0. fiimarioides {Sw.). 



146.— Dennsi'.cttia, Bernh. (1800). 



Sitiholium, Besv. (1827) ; /. Sm. (1841) ; Fatania, Presl. 



(1836) ; Bicksonia, Hooh Sp. Fil. 



Vernation uniserial and sarmentose. 7^;'o«(isbi-tripinnate, 



2 to 6 feet hig-h. Veins simple or pinnately forked, the 



exterior veinule or more soriferous. Beceptacles terminal. 



Sori globose, reflexed. Special and accessory indusia united, 



and forming a reflexed, bilabiate, or subentire calyciform 



cyst. 



Type. Bennst'xdtia punetiloha, Bernh. 



lUust. Hook, and Bauer., Gen. Fil., t. 61 ; Moore Ind. 



Fil., p. 79 A. ; J. Sm. Ferns, Brit, and For., fig. 



125 ; Hook. Syn. Fil., t. 2, fig. 13. 



Obs. This genus was orig-inally founded by Bernhardi 



on Trichomanes Jiaccida of Forster, but was afterwards with 



its allies better known as Bicksonia, with which they agree 



in the technical character of the sori, but their sarmentose 



