Gen, 2. — Ceterach. Willd. The same, with underside 

 oi frond densely covered with scales. 



Plenasium, Pr., Allantodia, Br., Neottopteris, I. Sm., and 

 Hemidictyum, Pr., are not represented in South Africa. 



Sect. 4. DiplaziecE. Pr. Sori linear, long, the lowest 

 upper, and sometimes all, bilateral or double. 



This tribe, containing Diplazium, Sw., Anisogonium, Pr., Di- 

 gramraaria, Pr., and Oxygonium, Pr., is not represented in S. Africa. 



Sect. 5. ScolopendriecB. Pr. Sori linear, long, opposite, 

 on adjoining opposite veins. Involucre corresponding, flat, 

 open sides facing one another. 



Gen. 1. — Scolopendrium. Sm. Veins close and parallel. 



Antigramma, Pr., and Camptosorus, Link., are not represented 

 in South Africa. 



TlllBE 4. 



DavcdliacecE. Gaudichaud. Sori infra-marginal, globose or 

 linear, on ends of veins or velnlets. Receptacle dot-shaped, 

 club-shaped, or linear. Involucre lateral, semi-orbiculate, 

 oblong, or linear, persistent, skinny, free at upper margin. 

 Rhizome sub-globose, or creeping. 



Sect. 1. DavalUecB. Pr. Sori globose or longitudinally 

 linear. Involucre semi-orbiculate or longitudinally linear. 



Gen. 1. — Microlepia. Pr. Sori removed from margin. 

 Involucre truncated, covering half the sorus. 



Gen. 2. — Davallia, Sm. Sori infra-marginal, on back of 

 teeth or sinus. 



Saccoloma, Kaulf., Humata, Cav.» and Loxsoma., A. Cunning- 

 ham, are not represented in South Africa. 



Sect. 2. LindsceacecB. Pr. Sori transversely linear, sub- 

 marginal, generally continuous. Involucre lateral, linear, 

 thin, membranaceous, free towards margin. 



Gen. 1. — Lindscea. Dryander. Sori and involucre con- 

 tinuous, parallel to margin. Veins much forked. 



Isoloma, I. Sm., Schizoloma, Gaudich., Synaphlebium, I. Sm., 

 and Dictyoxyphium, Hook., are not represented in South Africa. 



TRIBE 5. 



DicksoniacecB. Pr. Sori globose, sub-marginal on end 

 of veins or veinlets. Receptacle globose. Involucre lateral, 



