150 CHAEACTEES OF TRIBES AKD GENEEA. 



64. — HemiONITIS, Linn., in pari. 



Hemionitis, Acrosticlium, and Oymnogranima, sp. Hook. 



iSp. Fil. 



Vernatioii erect or sub-decumbent, acaulose. Fronds 

 simple, cordate, palmate or pinnate, smooth, villose or 

 squamose, 6 to 12 inobes in beigbt. I'eins uniform, reti- 

 culate ; m some the venules free next the margin. Sporangia 

 occupj^ing the whole of the venation, forming reticulate, 

 often confluent, superficial sori. 



Type. Hemionitis pahnata, Linn. 



Illust. Hook, and Bauer, Gen. Fil., t. 74 B.; Hook. Ex. 

 Fib, t. 83 ; Moore Ind. Fil., p. 45, B ; J. Sm. Ferns, 

 Brit, and For., fig. 64 ; Hook. Syn. Fil., t. 6, fig. 59, A. 



Obs. — The type of this genus is the well-known Hemionitis 

 palmata of Linnceus, to which several other species have 

 been added. Four of these possess the same general habit 

 as the type ; but this cannot be said of H.cordata, H.vestita, 

 and H. Muelteri, which, although I retain them as sections 

 of Hemionitis, are nevertheless almost worthy of being 

 regarded as types of distinct genera. 



* Hemionitis vera. 



Fronds palmate or loheJ,pinnatifid or siib-pinnate, villose. 



H. hederasfolia, /. Sm. (Hooh. Syn. Fil.) ; H. palmata 

 (Linn.) (v v.) ; H. podopbjdla (Hook.) (v v.) (H. pedata, 

 ■T. Sra.non Sw.) ; H.pinnatifida, Baler; H. pinnata, /. Sm. 

 (Hook. Syn. Fil.) 



Natives of the West Indies and parts of Tropical 

 America. 



** Sericonitis. 



Caudex decumbent, sub-sarmentose, .slwrt. Fronds con- 

 tiguous, pinnate, 6 to li inches long; pinnce contiguous,! to 



