POLYFODIEJE. lllX. 



lates an universal indusium ; the receptacles medial, prominent. 

 Veins simple or forked, from a central costa ; venules free. 



Fronds dimorphous, the sterile herbaceous, pinnato-pinnatifid ; 

 the fertile pinnate, with the pinnee much contracted, monilifonn, 

 the margins rolled inwards so as to cover the sori. Ehizome 

 erect caudiciform, producing stolones. A strikingly handsome, 

 tallish and easily recognised fern, owing to the entire dissimi- 

 larity between the fertile and sterile fronds ; yet technically very 

 little removed from Polypodium, scarcely differing indeed, ex- 

 cept in the production of contracted and revolute fertile fronds. 

 The European and North American plants belonging to this 

 genus, though quite distinguishable, are rather to be considered 

 as varieties than species. 

 Ex. : S. germanica, Willd. ; and $ pensylvanica. 



98. JAMESONIA, Hooker and Greville, Icon. Fil. t. 178. 



PlEBIDISSp., Auct.-, GYMNOGBAMMATISSp.,^W<*.; ALLOSOEI 8p., Preil ; 



AKOGBAMMATIS sp., Fee ; CHBILANTHIS sp., Deivaux. 



Sori spuriously-indusiate, few, rotundate, crinite, at length 

 confluent over the whole disk, not covered by the revolute her- 

 baceous margins of the pinnae (or pinnules) ; the receptacles 

 punctiform near the base of the venules. Veins forked from a 

 central costa; venules free. 



Fronds coriaceous, usually linear elongate, pinnate with nume- 

 rous crowded concave, oblique or imbricated roundish cordate 

 pinnse, sometimes bi-pinnate. Eachis villose; " indefinite in evo- 

 lution," (Fee.) Ehizome creeping or tufted. A peculiar well- 

 marked group as respects the majority of the species ; neverthe- 

 less, having but slight technical characters. 

 Ex. : J. imbricata, Hk. and O-r. I J. verticalis, Eze. 



J. scalaris, Kze. J. cinnamomea, Sue. 



J. hispidula, Eze. \ 3. paleacea, Eze. 



(b) Margins of the fronds not indiisioid, 

 * Veins free, 



9 9 . NOTHOCHL.S3NA, R. Srown, Prod. Fl. N. Soil. 145. 



CHTCINALIS Desvaux; ABGTBOCHOSMA, J. Smith; EKIOCHOSMA, J. 

 Smith LEPICHOSMA, J. Smith; GTMNOGBAMMATIS sp., faulfms; 

 iApril 1857.] G 



