CHARACTERS OF TRIBES AND GENERA. 265 



vernation marks them as a distinct group from the arbo- 

 rescent Diclisoiiia. The genus consists of about twenty 

 species, widely distributed in the tropics and sub-tropical 

 regions of both hemispheres, extending to New Zealand in 

 the south and Canada and Japan in the north. In the 

 " Species Filicum" thirty species are described, but many 

 of them are very doubtful as true species. 



Sp. D. obtusifolia ( Willd.) ; D. adiantoides (H. B.) (v v.) ; 

 D. cicutaria {Sw.) (v v.) ; D. dissecta {Sw.) (v v.) ; D. 

 apiifolia {Siv.) ; D. rubiginosa (KaulJ.) (v v.) ; D. anthris- 

 cifolia {Kaulj.) (v y.) ; D. davallioides (E. Br.) (v v.) ; 

 D. straminea (Lab.) ; D. cuneata (Rook.) ; D. appendicu- 

 lata {Wall.) ; D. pimctiloba {8w.) (v v.) ; D. strigosa (Sw ) ; 

 D. Moluccana {Bl.) (vt.) ; D. flaccida (5e'r«/i.) ; D. Pavoni 

 (ffoo/j.) (t v.) 



147. — Depaeia, Hooh. and Orev. (1836). 

 Eooh. Sp. Fil. 

 Vernation sub-fasciculate, decumbent. Fronds bipinnati- 

 iid, 1 to 2^ feet long. Feins pmnate ; venules free. Recep- 

 tacles puuctiform, terminal. Sori exserted ; special and 

 accessory indusia conniving, and forming- a calyciform. 

 pedicellate exserted cup, containing the sporangia. 

 Type. Dichsorda proUfera, KaulJ. 



Illust Hook, and Bauer, Gen. PU., t. 44, B. ; Moore Ind. 



Fil., p. 79 B. ; J. Sm. Ferns Brit, and For., fig. 124 ; 



Hook. Syn. Fil, t. 2, fig. 14. 



Obs. — This genus is founded on a Fern, a native of the 



Sandwich Islands, and, in aspect, differs from the rest of 



the alliance, the habit being more analogous to Athyrium 



in the tribe Aspleniece. The exserted pateriform sorus 



distinguishes it from Microlepia, but on comparing it with 



