MENISCIE^.— ASPLENIE^. xlvii. 



(c) Venules vrregnla/rly anastomosing, with free included veinlets. 

 60. DRYOMEWIS, FSe, O-en. Fil. 225. 



PKTTOGrENlA, J. Smith ILb., olim, J Detitaei^ sp., J.-SmWi. 



Sori non-indusiate, short oblong, transverse, in two series 

 between the primary veins ; the receptacles seated on the trans- 

 verse venules. Veins pinnate, from a central costa ; venules 

 transverse united by a zigzag vein, forming (in the fertile one 

 series, in the sterile a secondary series also, of) irregular areoles, 

 from which proceed (rarely in the fertile, copiously in the barren 

 fronds,) free included veinlets, variously directed. 



Blonds pinnate, herbaceous, the fertile taller and sub-con- 

 tracted. Rhizome thick, deciuubent. — A plant originally referred 

 to the PolypodieiB by Mr. Smith ; but its transverse sori bring 

 it into association with Menisdmn in our arrangement. 

 Ex. : D. meniBciicarpon (Drynaria, J. 8m. ; Dryomenis phymatodes, Fc^J 



§ AsPLEITIEiE. 



(a) Indusia simple distinct. 



61. ACTIIiriOPTERIS, Link, Fil. Sp. 73, 79. 



BELVlSLffi sp., Mvrbel; Asplewii sp., Aucf.; Blechn"! Bp., Fresl; ACEOS- 

 TICHI Sp,,Auct.; PtEEIDIS sp., .^wrf. ; ACEOPTEEIDIS sp., ii'dfe. 



Sori indusiate, linear, elongate; .the receptacles marginal in 

 the contracted rachiform segments, lateral on the veins (which 

 are few, and longitudinal). IndMsinm plane, membranaceous, 

 opening on the inner side. Veins few, simple, nearly parallel, 

 from an indistiact costa ; the basal and external ones sub-mar- 

 ginal, soriferous. 



!Pronds flabellately-partite, the segments rachiform hardly fo- 

 Uaceous, with few veins and marginal sori. Ehizome sub-globose, 

 — Curious little palm-like ferns. The sori here, though marginal 

 and apparently pteroid, are reaDy parallel with, and lateral on 

 the veins. They must therefore be placed among the Aspleniem, 

 where they form a sufficiently distinct group, related to Asple- 

 niv/m through A. septentrionale. 

 Ex, : A. australis, Lk. | A. radiata, ii. 



E 2 



