SYNOPSIS OF THE GENERA. 
17 
Section II. Orthophlebiem, .1. Smith.— Veins all free. 
59. WOODSIA, R. Brown. — Veins forked; venules simple. Sort round, terminal or medial, at first 
distinet, subsequently confluent ; indusium calyciform, nearly entire or deeply laciniated, the lacinia} 
usually terminating in long hairs which involve the spore-cases. 
60. Cystopteris, Bernhardi . — Veins forked ; venules simple. Sori round, medial, often becoming 
confluent ; indusium lateral, oblong, inflated, cucullate, attached beneath the sorus across the venule 
by its broad base, the free margin dentate or fimbriate. 
61. Lastrea, Presl. — Veins forked or pinnately costseform; venules direct. Sori round, uniserial, 
medial, or terminal ; indusium lateral, reniform, rarely orbicular, glabrous or pilose, sometimes 
cochleate. 
62. Pycnopteris, T. Moore. — Veins forked; venules elongate, parallel, direct, mostly terminating 
in club-shaped apices near the margin, the lowest anterior and posterior ones (sometimes more) in 
each fascicle soriferous. Sori large, roundish-reniforra, medial, near the costa, iiTegularly bi-tri- 
serial ; receptacle elevated ; indusium reniform. 
63. PoLYSTiCHUM, Schott . — Veins forked or pinnately-forked : venules direct, the lower anterior 
one more fertile. Sori round, medial, rarely terminal, uniserial ; indusium orbicular, peltate, rarely 
excentric and reniform. 
64. Cyclopletis, J. Smith. — Veins thi-ice dichotomously branched; venules direct, the lower 
anterior and posterior ones of each fascicle fertile Sori round, medial or terminal, biserial ; indusium 
orbicular, peltate. — Pinnae articulate. 
65. DiDYMOCHLiENA, Desvaicx. — Veins forked, radiating; venules direct, the apices of the sterile 
ones clavate, the anterior one fertile. Sori elliptical,, terminal, uniserial ; indusium oblong, longi- 
tudinally attached by its centre. — Pinnules articulate. 
66. Nephrolepis, Schott. — Veins forked ; venules direct, the anterior one soriferous. Sori round, 
terminal, uniserial ; indusium reniform, sometimes almost orbicular. — Pinnae articulate. 
67. Oleandea, Cavanilles. — Veins simple or forked ; venules parallel, direct, their apices curved, 
forming a slightly thickened margin. Sori round, costal or irregular, uniserial; indusium reniform, 
rarely orbicular. 
Tribe VI. DICKSONIEjE, J. Smith. — Sori marginal, round, globose, vertically-oblong or trans- 
versely-elongate, with a special interior-attached lateral indusium, conniving more or less with 
the changed indusiiform margin of the frond, forming urceolate calyciform or two-lipped cysts, 
or marginal grooves containing the spore-cases. 
Section I. Lindsceay J. Smith. — Spore-cases pedicellate, from an elongated transversely anastomosing, rarely 
simple, terminal receptacle; indusia plane two-lipped. 
68. Dictyoxipiiium, Hooker. — Fronds dissimilar, the fertile contracted with revolute margins, 
soriferous on the upper half. Costa central, prominent ; veins internal, nearly uniform, compouudly- 
anastomosing with variously directed free veinlets terminating in the areoles. Sori linear, continuous, 
occupying both margins ; indusium linear, attached to the receptacle, opening from the upper surface of 
the frond, and becoming rolled back. 
69. Lindsaja, DryawtZer. — Costa excentric or wanting; veins forked radiating; venules (sterile 
fronds) direct free ; or (fertile fronds) combined at their apices by the transverse receptacle. Sori 
linear, continuous rarely interrupted ; special indusium linear, continuous, usually shorter than the 
indusiiform margin of the frond. 
Section II. Davalliecey J, Smith. — Spore-cases pedicellate from a simple terminal receptacle ; indusium more or 
less attached by its base and sides, rarely by its base only, equalling the margin of frond and forming an 
urceolate two-lipped or tubular vertical cyst. 
70. Leucostegia, Pres^. — Veins forked; sewwfes direct, free. /Sori round, terminal, often solitary 
on each segment, seated in the sinus ; indusium scariose, orbicular or oblong, its sides free. 
D 
