4 
Gen, 2. — Ceterach. Willd. The same,, with underside 
o { 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 Diplaziuin, S\v., Anisogonium, Pr., Di- 
grammaria, Pr., and Oxygonium, Pr., is not represented in S. Africa. 
Sect. 5. Scolopendriece. Pr. Sori linear, long, opposite, 
on adjoiniug 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. 
TRIBE 4. 
Davalliacece . Gaudichaud. Sori infra-marginal, globose or 
linear, on ends of veins or veinlets. 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 . Davalliece. 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. Lindsceacece. 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, 
Dicksoniaceoe. Pr. Sori globose, sub-marginal on end 
of veins or veinlets. Receptacle globose. Involucre lateral. 
