persistent, bivalve; the true one being the lower valve, 
affixed laterally by semi-circular line, the accessory one 
being like a cap, formed of teeth of frond, and covering 
the sori. 
This tribe, containing Balantium, Kaulf , Cystodium, I. Shi., 
Culcita, Pr., Leptopleuria, Pr., Dicksonia, Pr., Patania, Pr., 
Cibotium, Kaulf., Thyrsopteris, Kze., and Deparia, Hooker, is not 
represented in South Africa. 
TRIBE 6. 
Adiantacece. Pr. Sort linear, or oblong, or globose ; 
marginal, seldom sub-marginal ; fixed on underside of in- 
volucre, springing from end of veins or veinlets. Recep- 
tacle linear or dot-shaped. Involucre formed of reflexcd 
margin, bearing the capsules, linear, oblong, semi-orbiculate, 
or semi-lunate. 
Sect. 1. Adiantarice. Pr. Sort separate, but soon con- 
fluent, covering the margin of the whole pinnae, on edge 
of teeth or segments. 
Gen. 1. — P ter is. L. Sori linear, marginal, continuous. 
Veins simple or forked. Involucre broad. 
Gen. 2. — Lomciria. Willd. Fertile frond contracted ; 
veins ditto ; sori sub-marginal. 
Gen. 3. — Campteria. Pr. Like Pteris , but lower veins 
anastomosing and arching at sinus. 
o 
Gen. 4. — AUosorus. Bernh. Sori roundish, separate, then 
confluent and linear, hid by folded margin and involucre. 
Gen. 5. — Cryptcgramma . Br. Sori linear, on oblique 
veins, hid by folded margin ; no involucre. 
Gen. 6. — Adiantum. L. Sori marginal, globose, kidney- 
shaped, oblong or linear ; distinct, or confluent, or continuous. 
Involucre corresponding to sori, formed of reflexed margin of 
underside of frond, and beaVing the capsules beneath. 
Gen. 7. — Cheilanthes. Sw. Sori marginal, globose, 
generally upon a lobe or tooth of the margin of frond, which 
becomes reflexed, solitary, contiguous or confluent. Involucre 
kidney-shaped or oblong. 
Haplopteris, Pr., Litobrochia, Pr., Amphiblestra, Pr., Cerato- 
dactylis, I. Sm., Onychium, Kaulf., Jamesonia, Hook, et Greville, 
Hewardia, I. Sm., and Ochropteris, I. Sm., are not represented in 
South Africa. Platyloma, I. Sm., is included in Allosorus, Bernh., 
and Cassebeera, Kaulf., in Cheilanthes, Sw. 
