GENEBA OB PEEKS : 



Fronds small, fasciculate erect, sterile and deeply toothed below? 

 above dilated soriferous often becoming folded longitudinally. 

 Erbizome stoloniferous. The sori of this fern are often described 

 as grammitoid, " oblong, oblique, at the base of the lateral veins, 

 at length confluent." To us they appear to be produced in a 

 line contiguous to the midrib, and seem little different from 

 Pleurogramma. 

 Ex.: X. serrulata, Elfs. 



(d) Veins compoundly anastomosing. 



26. HYMENOLEPIS, Kaulfuss, Enwm. Ml 146. 



HYAIOLEPIS, Eunze ; MACEOPLETHUS, Presl ; ACBOSTICHI sp., Auct. ; 

 ONOCLE.S sp., Swartz; GYMJTOPTEBIDIS $p.,Auct.; LOMABIJE sp., Auct . ; 

 SCHIZ.&.S sp., Smith; BELTISI^ sp., Mirbel; TJENITIDIS sp., Auct. 



Sori superficial, linear-elongate or linear-oblong, on the con- 

 tracted apex of the fronds ; the receptacles contiguous to and 

 coalescent with the costa, sometimes covered while young by the 

 revolute margin. Veins indistinctly pinnate from a central costa, 

 or nearly uniform ; venules compoundly anastomosing, forming 

 crowded irregular areoles, from which proceed variously directed 

 included free veinlets. 



Fronds simple, opaque, linear lanceolate ; the apex fertile con- 

 tracted, straight or curved. Khizome creeping. This well- 

 marked group, usually placed with the Acrostichece, accords much 

 more closely with the Plewogrammea. 



Ex. : H. spicata, Presl. I H. platyrhynchos, JEie. 



H. revoluta, Bl. 



H. platyrhynchos, JEi 

 H. validinervis, Kze. 



27. GYMNOPTEBIS, Sernhardi, Sokra&et, Journ. Sot. 

 1800, ii. 121, (emend) : Presl, Tent. Pter. 242, (reduct.) 



LEPTOCHII-US, Zaulfuss ; DENDBOGLOSSA, Preil ; ACEOSTICHI sp., Auct ; 

 LEPTOCHILI sp., Fee; OsMuifD sp., Auct.; POLTBOTEY* sp., Metteniu*. 



Sori superficial, non-indusiate, linear continuous, at length 

 effuse ; the receptacles contiguous to the costa of the contracted 

 fronds, often occupying nearly the whole under surface, some- 

 times double on each side the costa. Veins pinnate from a cen- 



