PLATTLOME^E. livii. 



94. LLAVEA, Lagasca, Gen. et Sp. Plant. 33. 



CEEATODACTTLIS, J. Smith ; BOTBYOGRAMMA, Fee; AILOSOBI sp., Auct ; 

 ASPLEN ii sp., Sprengel ; ALLANTODIJE sp., Desvaux, 



Sori spuriously-indusiate, linear, simple or forked ; the recep- 

 tacles occupying nearly the whole length of the' veins, sub- 

 confluent ; the margins of the pinnules revolute membranaceous 

 iudusiiform. Veins simple or forked, from a central costa ; 

 venules free. 



Fronds tri-pinnate, sub-coriaceous, glaucescent, fertile and 

 contracted, the pinnules revolute siliquiform, in the upper part ; 

 the sterile pinnules serrulate, the apices of the venules being ex- 

 serted beyond the thickened margin. Stipes pallid flexuose. 

 Ehizome erect, the fronds fasciculate. There is no reasonable 

 doubt that Llavea must be synonymous with Ceratodactylis, as 

 was long since pointed out to us by Mr. Howard ; this view Mr. 

 Smith has also adopted. 

 Ex. : L. cordifolia, Lagasca (Ceratodactylis osmundioides, J. Sm.) 



95. CRYPTOGRAMMA, R. Brown, App. FranM. 



Jowrn. 767. 

 ALLOSOBI sp., Auct.; GYMNOGBAMMATIS sp., Presl ; PHOBOLOBFS sp., 



Fee. 



Sori spuriously-indusiate, oblong or linear, at length laterally 

 confluent into an intramarginal band, covered by the revolute 

 attenuated indusiiform margins of the pinnules ; the receptacles 

 also oblong or linear, near the apices of the veins. Veins simple 

 or forked, from a central costa, which is sometimes evanescent 

 in the sterile fronds ; venules free. 



Fronds dimorphous, dwarf, herbaceous, bi-tri-pinnate ; the fer- 

 tile contracted, i.e., with revolute siliculiform pinnules. Ehizome 

 short decumbent. This genus is intimately connected in habit 

 with Allosorus, in its restricted sense, from which it differs in 

 having oblong oblique, not punctiform, receptacles. We, with 

 little hesitation, follow Mettenius in keeping them distinct. The 

 two genera form the connecting links between Platylomece and 

 Polypodies. 



Ex. : C. aerostichoides, R. Br. \ C. Brunoniana, Wall. 

 C. sitchensis (Allosorus, EuprecMJ 



