500 
TILICES. 
[Nephr odium. 
simple distinct veinlets. Sori medial. Involucre membranous, gla- 
brous, fugacious. Aspidium caudiculatum, Sieber . A. mascaranense, 
Kaulf. 
Mauritius, in -woods. Also Bourbon, Madagascar, and Tropical Asia. 
18. N. subtriphyllum, Baker ; Hook, and Baker , Syn. Fil. 296. 
Eootstock short-creeping ; scales small, brown, linear. Stipes brown, 
glossy, naked, a foot long. Frond deltoid, bipinnate, about a foot long 
and broad, glabrous except the main ribs on the lower surface. Free 
pinnae about 3 pairs, the upper lanceolate, the lowest pair much the 
largest, deltoid, produced on the lower side, with the lowest pinnule 
usually free. Main veins distinct from the midrib to the edge, with 
intermediate veins anastomosing in copious irregular areolae with free 
included veinlets. Sori small, scattered irregularly. Involucre mi- 
nute, fugacious. Polypodium reticulatum, Bojer , Sort. Maur. 419. 
Phegopteris triphylla, Kuhn, Ml. Afric. 124. 
Mauritius, in the woods of Anse Courtois. Through Tropical Asia, not African. 
19. N. pleiotomum, Baker ; Hook, and Baker, Syn. Fil. ed. ii. 297. 
Eootstock and basal scales not seen. Stipes 1-1| foot long, black, 
glossy, naked. Frond membranous, glabrous, deltoid, bipinnate, 1-1| 
foot long and broad. Free pinnae 2-3 pairs, the upper ones lanceolate, 
the lowest pair deltoid, distinctly stalked, much produced on the lower 
side, the lowest pinnule nearly or quite free. Main veins distinct 
from the midrib to the edge, with intermediate veins anastomosing in 
copious small areolae with free included veinlets. Sori small, scattered 
irregularly. Involucre minute, fugacious. Wright in Trans. Boy. 
Irish Acad. xxv. t. 31 B. 
Seychelles, common in the woods of Mahe, Ward! Wright ! Horne! Also 
Madagascar. 
20. N. Pica, Baker ; Hook, and Baker , Syn. Fil. 298. Eootstock 
suberect ; scales lanceolate, dark brown. Stipes contiguous, black, 
glossy, naked, |-1 foot long. Frond deltoid, deeply pinnatifid or the 
lowest one or two pairs of primary segments free, 6-15 in. long and 
broad, membranous, glabrous except the main veins on the under sur- 
face. Central segments lanceolate, acute ; lowest pair largest, deltoid , 
produced and deeply pinnatifid on the lower side. Main veins distinct 
from the midrib to the edge, the intermediate veins anastomosing in 
copious areolae with free included veinlets. Sori large, arranged 
in regular rows near the main veins. Involucre membranous, 
glabrous. Aspidium trifoliatum, Sw. in part; Bojer, Hort. Maur. 
392. 
Mauritius, frequent in woods. Also Bourbon and Madagascar. Capillaire a 
grandes feuilles. 
