Xlviii. GEITEEA OP PEENS: 



62. ASPIiEWItTM, LmncBus, Gen. JPl. 783. 



pHTXLms, Mcmch; Onoptebis, Necher; Cxsottsvis, Bergius ; Dar^a, 

 Juasieu ; Aceoptebis, J/viik; Amesitjm, Newman ; HoMALOH3UBOir, 

 Klotgzch; Tabachia, Freslj Bbacktsohtjs, Freslj Htpochijjits, 

 FSe; DABfiASTKUM, JV« ; AiLAWTom^ sp., B. Brown; Athybh ep., 

 Auct.s PoLXPODii sp., Auct.; Aspidh sp,,Auct.; Scolopendbh sp.. 

 Roth; DiPfiAzii sp., Auct. ; AcBOSTicHi sp., LinTUBuss Blechwi sp., Auct, 



Sori Indusiate, linear short or elongate, oblique ; the rec^ia' 

 cles lateral on the anterior side of the veins. Indusium linear 

 membranaceons, plane or fornicate. Veins simp]e or forked 

 from a central costa, (sometimes single and costseform in the 

 ultimate narrowly-cut segments) ; or forked from the base of the 

 segments, the costa being evanescent or wanting; venules paraUel, 

 direct, free. 



Fronds coriaceous, herbaceous or membranaceous ; rarely 

 rachiform ; simple lobed pinnate or rariously decompound j the 

 rachis or veins not rarely proliferous. Sori usually on the 

 anterior side of the venules, but often inverse in the basal 

 aTiricles, sometimes diplazioid. Khizome short erect or de- 

 cumbent, sometimes stoloniferotxs. — A very extensive and 

 varied genus, yet not presenting definite or sufficient characters 

 by which it might be broken up. The sections indicated below 

 are distinct enough in their typical species, but merge more or less 

 into each other through other species of intermediate character. 

 In the § § ^uasplenium, Acrofteris, and Da/rcea^ the indusium is 

 flat, plane ; while in § Allantodia it is arched or vaulted. 



§ Suasplenium. — Sori oblong or linear ; veins simple or forked fiwm a 

 cost^ and divergent at a broad or obtusish angle; or dimidiately-for- 

 cate ; fronds usually 1- Bometimes 2- 3- pinnate, or simple. 



Ex. : A. serratnm, Lin. 

 A. marinum, lAn. 

 A. auricularium, Desv. 

 A. lanceolatum, Suds. 

 A. nitens, Sw. 

 A. dimidiatom, Wllld, 



A.HemionitiSjXin. (A.palinatam,2jaffi.y 



A. alatnm, S. et B. 



A. elongatum, Sw. 



A. Petrarchse, DC. 



A. pseudo-nitidum, Saddi, 



A heterocarpxnn. Wall. 



§ Acropteris. — Sori linear; veins flabellato-forcate without a costa; or 

 simple or forked, and diverging at a very acute angle from an evan- 

 escent costa; &onds 1- 2- 3- pinnate. 



Ex. : A. euneatum, Lam. I A. dimidatum. Sic. (A. zamisefolium 



A. laserpitiifolium, Xam. A. pnemorsum, Sw. [Lodd.J 



A. septentriouale, Xin. | A. £ata-maraii% Xin. 



