Ixvi. GENERA 0V TEENS: 



(e) Veins pinnate ; venules reticulated, with free included veinlets. 



92. SELIiIG-TJEA, JBory, Diet. Class. tfHist. Nat. vi. 587. 



DIAGEAMMA, Blume; COLYSIS, Presl ; DICTYOGHASTKA, Presl; GBAMMI- 

 TIDIS sp., Auct.; GYMNOGRAMMATIS sp., Auct.; HEMICCMTIDIS sp., Auct.; 

 POLTPODII sp., Auct.; CETBEACHIS sp., Auct. 



Sori non-indusiate, oblong or linear, oblique; the elongate 

 receptacles lying between and parallel with the primary reins. 

 Veins pinnate or sub-pinnate from a central costa ; venules com- 

 poundly anastomosing, producing within the areoles variously 

 directed free curved veinlets. 



Fronds simple, rarely pinnatifid or palmately-lobed, herbaceous 

 or coriaceous. Rhizome creeping. Separable from Loxogramma 

 by the pinnate character of the venation. 



Ex. : S. Peei, Sory. I S. pedunculate, SI. 



S. membranacea, Bl. S. macrophylla, Bl. 



S. pothifolia, J. Sm. | S. Finlaysoniana (Grammitis, Wall.) 



PLATYLOME.E. 



93. PLATYLOMA, J Smith, Hook. Journ. Sot. iv. 160. 



PBLL.SA, Link; ALLOSORI sp., Auct.; PTEBIDIS sp,, Auct.; ADIANTI sp., 

 R. Brown ; ASPLENII sp., Bernhardi. 



Sort spuriously-indusiate, marginal, oblong ; the receptacles 

 oblong at the apices of the veins, contiguous ; the spore-cases 

 laterally confluent and forming a broadish marginal band. 

 Indusium (spurious) formed of a narrow continuous attenuated 

 inflexed portion of the margin. Veins simple or forked, from a 

 central costa ; venules parallel, free, soriferous along a portion of 

 their length at the upper end. 



Fronds pinnate or bi-pinnate, coriaceous or sub-coriaceous, 

 often glaucescent, the pinnae sometimes articulated. Stipes often 

 ebeneous. Ehizome short, decumbent or creeping. This genus 

 unites the Platylomeee with the G-ymnogrammece, through Ptero- 

 zonium. We do not find in it any affinity with the Pterideoe, 

 among which it is often placed. 



Ex. : P. Brownii, J. Sm. I P. rotundifolium, J. Sm. 



P. falcatum, J. Sm. P. flexuosum, J. Sm. 



P. sagittatum, J. Sm. \ P. pulehellum (Allosorus, M. $ Oal.j 



