Descriptions of the Species. 
189 
Natal. — (Gueinzius), abundant in openings in the bush swamp at head of 
Bay of Natal, and a few plants on rocks by Palmiet and Nonoti only 
(Buchanan, Wood). 
Genus XXIV. — Oleandra. Cav. 
Fronds simple, articulated to the long woody scandent 
rhizomes, and having one central costa from which the smaller 
veins spread to the margin. Veins rising one or two together, 
simple or dichotomously forked into parallel veinlets, and bearing 
the sori in an irregular line near the mid-rib, and mostly on 
unforked veins. Sorus covered by a reniform indusium. This 
genus consists of a few species of similar and very distinct habit, 
all tropical or almost so. 
1 14. Oleandra articulata. Cav. 
Plate CVII. Fig. 1. Natural size. b. Portion of frond enlarged 
showing venation. 
Rhizome very long, slender, scandent above ground, with 
scattered fronds, and abundant, linear, adpressed, shining brown 
scales. Fronds simple, thinly coriaceous, glabrous, lanceolate, 
nine to fifteen inches long, one to one and a half inches broad, 
tapering quickly to an acute point, and rather slowly to a rounded 
base. Stipe one inch long, jointed close to the rhizome, with 
numerous involved scales below the joint, and with scattered 
lanceolate scales above the joint and on the mid-rib. Roots very 
long and wiry, hanging singly from below each old frond. Margin 
of frond entire, slightly undulated. Sori rather large, in an 
irregular line on each side the mid-rid, and one to three lines 
distant from it. Indusium reniform. Veins numerous, easily 
seen, and several times forked. When grown in sunshine the 
fronds are shorter, and the rhizome more scaly. Some specimens 
in Herb. Gub. have the rhizome scales nearly black, and the frond 
jointed a half-inch from the rhizome. 
