6 



Sect. 2. Lonchitidew. Pr. Sori globose or linear, occu- 

 pying sinus of teetli and segments. Involucre semi-lunate 

 or linear, marginal. 



Gen. 1. — Hypolepis. Bernli. Sori punctiform, sub-globose. 

 Veins simple or forked. 



Gen. 2. — Lonchitis. L. Sori linear, semi-lunate. Veins 

 anastomosinoc. 



GROUP 2, having no involucre. Sori naked. 



TKIBE 7. 



Vittariacece. Pr. Sori sunk in margin, linear, or globose. 

 Rhizome creeping. 



Gen. 1. — Vittaria. Sm. Sori linear. Frond simple, 

 linear. 



Prosaptia, Pr., (a doubtful genus) is not represented in South 

 Africa. 



TRIBE 8. 



Polypodiacecs. Pr. Soin globose on apex or back of 

 veins in disc of frond; seldom confluent. Receptacle dot- 

 shaped. Rhizome creeping, seldom sub-globose. 



Sect. 1. Strutliiopteridece. Pr. Fertile fronds contracted. 



This tribe, containing only one genus, Struthiopteris, Willd., is 

 not represented in South Africa. 



Sect. 2. PolypodiecB. Pr. Margin of frond uniform with 

 disc, flat. Fronds often simple or digitate. 



Gen. 1. — Polypodium, Lin. Sori at end of simple or 

 forked veins, or on mid-veins or veinlets. 



Gen. 2. — Goniopteris. Pr. iS'orz on mid-veins ; first four 

 opposite veins anastomosing in acute angled arch. 



Gen. 3. — Marginaria. Bory. Sori 1-3 serial, at end of 

 primary, or secondary, veinlets, in hexagonal macula?. 



Gen. 4= — Pleopeltis. Humboldt and Bonpland. Sori 

 large, serial, veinlets anastomosing, the middle maculae con- 

 taining two or three secondary veinlets, making an oblong- 

 macula, bearing sorus at the end. Pedicellated scales in 

 sorus. 



Gen. 5. — Phymatodes. Pr. Veins anastomosing, secon- 

 dary veinlets clubbed. Sori at end of veinlets. 



