

CXXlii. 



Order MARATTIACE^E. Tribe DAN^INE^E. 



173. DAN2EJA, Smith, Mem. Acad. Turin, v. 420, t. 9. 



ABTHRODATTJEA, Presl; HOLODAN-ZEA, Presl ; HETERODAIOSA, Presl; 

 ? DAN.&OPSIS, Presl; ASPLBNII sp., Linnaus. 



Sori dorsal, linear, occupying the whole length of the parallel 

 veins, crowded so as to cover the whole surface of the fertile 

 fronds ; each sorus consisting of a double linear series of 

 numerous erect fleshy spore-cases, which are oblique-ovate with 

 a contracted mouth, united laterally and by their inner faces, 

 sunk in a confluent fleshy persistent elevated mass (which may 

 be taken to represent an involucre), and at length opening at 

 top by a small round aperture. Receptacles slender (according 

 to Presl) . Veins forked, from a central costa ; venules parallel, 

 their apices arcuately confluent with the margin. 



Fronds pinnate, rarely simple, fleshy coriaceous, the fertile 

 somewhat contracted; pinnse usually articulate. Rhizome 

 woody, erect or decumbent. A genus remarkable for its 

 crowded spore-cases, consolidated in a fleshy mass, which re- 

 presents an involucre, and opening by pores over the surface. 



Danceopsis of Presl, if possessing anastomosing venation, as 

 figured by Kaddi, together with the true fructification of this 

 order, should form a separate genus. 



Eudatuea. Sori affixed to the veins by their whole length (Preil.J 

 Ex. : D. simplicifolia, Rudge. I D. nodosa, Sm. 



D. Leprieurii, Kze. D. alata, Sm. 



D. trifoliata, Schb. \ D. elliptica, Sm. 



Heterodancea. Sori affixed at the centre, otherwise free (PretlJ 

 Ex. : D. stenophylla, Zze. 



? Danteopsis, Sori? .;...; veins anastomosing (Presl.J 

 Ex. : D. paleacea, Raddi. 



Order OPHIOGLOSSACE^E. 

 (a) Fructifications in a branched panicle. 



174. BOTBYCHIUM, Saartz, Schrad.Joitrn.l800,u.8,llO. 



OSMUKDA, Bernhardi, and Auct. ; BOTHYPUS, Michaux. 

 Fructifications paniculate, formed of numerous secund spikelets, 



