XXVIl] 



SPHENOPTERIS 



529 



Cladophlebis lobifolia (Phill.) is a case in point ^. In this 

 fern, which some authors speak of, without sufficient reason, 

 as Dicksonia lobifolia^, the lowest pinnule is large and different 

 in shape from the others. 



Fio. 352. A. Sphenopteris ohtusiloha. Pinnule. (Enlarged. After Zeiller.) 

 B, C. S. ohtusiloha. (^ nat. size. After Zeiller.) 



D. Pecopteris arhorescens. (Slightly enlarged. After Zeiller.) 



E. Sphenopteris furcata { = Diplotmema furcatum). (Slightly en- 

 larged. After Zeilfer.) 



Sphenopteris. 



Sphenopteris is one of the many generic names which we 

 owe to Brongniart^. It is the generic designation used for a 

 great number of Palaeozoic and later fronds, most of which are 

 those of true ferns while some Palaeozoic species are undoubted 

 Pteridosperms. The genus, which is purely provisional, includes 



•1 I6id. p. 145. 



^ Eaciborski (94) A. PI. xi. 



3 Brongniart (22) A. 



