190 
The Ferns of South Africa. 
Oleandra articulata. Presl.; Pappe and Rawson, 13; Kuhn, Fil. Afr. 
144 ; Hk. and Bkr. Syn. Fil. 302. 
Aspidium articulatum. Sw. ; Kunze, Linnsea, 18.123. 
Oleandra neriiformis. Hk. Sp. 4, p. 156, in part (not O. neriiformis. Cav.) 
Tropical and sub-tropical Africa and islands ; among rocks, 
mostly in shade though sometimes exposed. 
Natal. — (Gueinzius), Intshanga, Maritzburg, Kranzkloof, Noodsberg, 
Umpumulo, 2000 to 3000 feet (Buchanan), Midland districts (Wood). 
Transvaal. — Magalisberg (Zeyher, Burke, 530). 
Genus XXV. — Polypodium. Linn. 
Sori round or nearly round, without indusium. 
A very large genus, containing species of very diverse habit, 
though all our species except the first two have a considerable 
general resemblance among themselves. The earlier botanists 
included under Polypodium all ferns with round dorsal sori, 
whether they had an indusium or not ; but since then the genus 
even as above restricted has been divided by some botanists into 
many genera, distinguished by the venation. Our species are 
arranged under the following sub-genera in Hk. and Bkr. 
“ Syn. Fil” 
Desmobryoid series. Stipes not articulated to the caudex. 
(Phegopteris. Mett.) 
§§§ Goniopteris. Presl. Veinlets of neighbouring pinnules uniting. 
Species 1 1 5, 116. 
Eremobryoid series. Stipe articulated to the rhizome. (Poly- 
podium. Mett.) 
§§§§§ Eu-polypodium. Veins free. Species 1 17. 
§§§§§§ Goniophlebium. Blume. Sori terminal on the single free veinlet 
inside the large regular areolae. Species 118, 119. 
' §§§§§§§§ Campyloneuron. Presl. Primary veins distinct from the mid-rib 
to the edge, connected by parallel transverse veinlets. Areolae similar, 
containing two or more sori ; the free veinlets all directed toward the 
edge. 
