264 CHAEACTEES OF TEIBES AND GENEEA. 



definite fronds, and the other scandent and indefinite, the 

 latter forming the genus Stenoloma of Fee. 



* Fronds definite, 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 (Kaulf.) ; 0. microphylla (Sw.) ; 0. chinensis 

 (Linn.) ; 0. retusa (Cav.) ; 0. clavata (Sw.) 



** Fronds scandent (Stenoloma, Fee.). 

 O. divaricata (Schlecht.) (D. Schlechtendahlii, Hook.) ; 0. 

 aculeata (Sw.) (v v.) ; 0. fumarioides (Sw.). 



146. DENNSTJJDTIA, Bernh. (1800). 

 Sitibolium, Desv. (1827) ; /. Sm. (1841) ; Patania, Presl. 



(1836) ; Dicksonia, Hook Sp. Fil. 



Vernation uniserial and sarmentose. Fronds bi-tripinnate, 

 2 to 6 feet high. Veins simple or pinnately forked, the 

 exterior veinule or more soriferous. Receptacles terminal. 

 Sori globose, reflexed. Special and accessory indusia united, 

 and forming a reflexed, bilabiate, or subentire calyciform 

 cyst. 



Type. Dennstcedtia punctiloba, Bernh. 

 Illust. 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 originally founded by Bernhardi 

 on TricJiomanes Jiaccida of Forster, but was afterwards with 

 its allies better known as DicJcsonia, with which they agree 

 in the technical character of the sori, but their sarmentose 



