nviii. flBNBEA 01 PEEKS: 



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

 above dilated soriferous often becoming folded longitudinally. 

 Ehizome stoloniferous. — ^Tbe sori of this fern are often described 

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

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

 line contiguous to the midrib, and seem little different from 

 ^lewrogramma, 



Ex. : X sermlata, Klfi. 



(d) Veins com/ponndly anastomosing. 



26. HYMENOLEPIS, Kaulfuss, Snvm. Ml. 146. 



Htaiolbpis, ^UTtze; Macboplethits, Fresl; Aceostichi sp.,Auci.i 

 OwocLEiE sp., Swartz ; GrMNOPTEETDIS Bp.fAuct,; LOMAEIS sp., Auct.; 

 ScHizi^ sp., Smith; Beltisls sp., Mirbel; T^ititidis sp., Aim^. 



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 eoTered while young by the 

 revolute margin. V^ns iudistinctly pianate 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. Bhizome creeping. — This well- 

 marked group, usually placed with iha Aerostichea, accords much 

 more closely with the FlemrogrammeiB. 



Ex, : H. Bpicata, Freal. 1 H. plaiTrhynclios, Sjse, 



H. revolnta, M, I H. validinervis, Kze. 



27. GYMNOPTEEIS, SemTwrdi, ScTi/rader's Jonm. Bot. 



1800, ii. 121, (emend.) ! Fresl, Tent. Pter. 242, (reduct.) 



Leptochiltjs, XavZfuis; Dendeogiossa, Fresl; Aceostichi sp., Auci; 

 LEPTOcmxi sp., FSe; Osmuitd^ sp., Auct ; Polybotet^ sp., Mettenitu. 



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

 efiiise ; 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 irom a cen- 



