CHAKACTEES OF TRIBES AND GENERA. 265 



vernation marks them as a distinct group from the arbo- 

 rescent Dicksonia. 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 ( mild.) ; D. adiantoides (H. B.) (r v.) ; 

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

 apiifolia (Sw.) ; D. rubiginosa (Kaulf.) (v v.) ; D. anthris- 

 cifolia (Kaulf.) (v v.) ; D. davallioides (R. Br.) (v v.) ; 

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

 lata ( Wall.) ; D. punctiloba (Sw.) (v v.) ; D. strigosa (Su>.) ; 

 D. Moluccana (Bl.) (vv.) ; D. flaccida (Bernh.) ; D. Pavoni 

 (Hook.) (v v.) 



147. DEPARIA, Hook, and Grev. (1836). 



Hook. Sp. Fit. 



Vernation sub- fasciculate, decumbent. Fronds bipinnati- 

 fid, 1 to 2 feet long. Veins pinnate ; venules free. Recep- 

 tacles punctiform, terminal. Sori exserted ; special and 

 accessory indusia conniving, and forming a calyciform 

 pedicellate exserted cup, containing the sporangia. 

 Type. Dicksonia prolifera, Kaulf. 



Illust Hook, and Bauer, Gen. Fil., 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 



