94 
Throughout the whole world except the Arctic 
Zone and temperate South America. 
Genus XVI.—Dorvyopteris J. SMITH 
(Deriv. Dory, spear ; pterts, fern—in allusion 
to the shape of the fronds.) . 
Fronds triangular or halberd-shaped or pal-— 
mately divided ; veins copiously anastomosing, 
without free included veinJets. The rest as in 
Pteris. 
Doryopteris ludens Bedd. (Pteris ludens Wall.) 
Rhizome creeping, scaly; scales closely ad- 
herent tothe rhizome and having white margins. © 
Stipe arising at intervals from the rhizome, 
black polished, slightly scaly, often hairy, 
those of the barren frond 3-4 inches long, those 
of the fertile up to 12 inches long. Fronds of 
two kinds. Barren ones triangular to halberd- 
shaped with two well-marked lobes, margin 
entire. Fertile fronds 4-6 inches each way, 
deeply lobed and roughly palmate, the lobes 
lanceolate and five in number, two basal, two 
spreading and one terminal. The basal lobes 
are deflexed and often forked. Texture leathery. 
Midribs of the segments polished like the 
