18 
SYNOPSIS OF THE GENERA. 
71. Microlepia, PresZ Vehis forked or pinnate; venules direct, free. Sori round or oblong, 
vertical, superficial, intramarginal ; receptacle elevated ; spore-cases spreading, rarely immersed in 
a cystiforin cavity; indusium attached by its base and sides widening upwards, the free margin 
rounded or truncate. 
72. Deparia, Hooker . — Veins pinnate ; venules simple, direct, their apices free and sporangiferous. 
Sori globose, extra-marginal ; spore-cases pedicellate, vertical ; the indusia forming with the indusiiform 
teeth, calyciform exserted cysts. 
73. Davallia, Smith. — Veins forked ; venules direct, free, with their apices soriferous. Sori verti- 
cally oblong, intramarginal ; sp>ore-cases pedicellate, exserted beyond the free margin of the indusium ; 
indusium inflated, forming with the changed margin of frond, a vertical two-lipped or tubular cyst 
with the apex usually constricted. 
Section HI. Tricliomanea:, J. SmitR.— Spore-eases sessile, seated compactly around a columnar receptacle, included 
■within a bilabiate or urceolate usually vertical cyst, formed by the connivance of the indusium -with the margin 
of the frond, 
74. Triciiomanes, Linnceus , — Veins simple or forked, dmect. Sori vertically oblong, terminal ; 
spore-cases sessile ; receptaeJe filiform exserted ; indusium urceolate or calyciform. 
75. Hymenophyllum, .S'lmt/j. — Ferns direct, free. iS'ort globose or vertically oblong ; sp)ore-cases 
sessile; receptacle columnar included; indusium urceolately two-lipped. 
Section IV. Dicksonieco, J. Smith. — Spore-cases pedicellate from a round terminal receptacle, included within 
a concave two-lipped or calyciform reflesed cyst, formed by the connivance of the special indusium with 
the indusiiform crenules of the frond. 
76. SiTOBOLiUM, Desvaux . — Veins pinnate; venules simple or forked, direct, their apices free and 
sporangiferous. Sori globose, exserted ; receptacle elevated, globose ; special and accessory indusia 
nearly equal, forming a reflexed entire or two-ljpped calyciform cyst. 
77. Balantium, Kaulfuss . — Veins pinnate ; venules simple or forked, direct, free. Sori large, 
nearly globose, exserted, solitary on each segment ; receptacle elevated, oblong ; special and accessory 
indusia coriaceous, nearly equal, forming slightly reflexed oblong transversely two-lipped cysts. 
78. Dicksonia, L’Heritier. — Ferns pinnate ; venules simple, direct, free, soriferous at the apex. 
Sori large, globose ; receptacle elevated, globose ; indusia coriaceous, the accessory cucullate, larger 
than the special, forming with it a reflexed unequal two-lipped cyst. 
79. CiBOTiUM, FTmf^ifss. — Veins forked or pinnate ; venules direct, free, soriferous at the apex. 
Sori somewhat globose, superficial, seated on the interior edge of the margin or sinus ; receptacle 
small ; indusium coriaceous, of two unequal valves, forming a reflexed adnate two-lipped cucul- 
late cyst. 
Tribe VII. CYATHEJ5, J. Smith.— ^or\ round, globose, intramarginal, medial or axillary, fur- 
nished (generally) with a calyciform or lateral interior-attached special indusium, or naked, or 
furnished with articulate hairs involving the spore-cases. Receptacle elevated, globose, or 
columnar. Spore-cases usually sessile and compressed. 
80. Cyathea, Smith. — Veins pinnately-costeeform ; venules forked, direct, free. Sori medial or 
costal, uniserial, usually axillary in the forks of the veins ; sp>ore-cases compressed, seated on a globose 
receptacle ; indusium inferior, with an operculiform apex, becoming calyciform, entire or unequally 
lacerated. 
81. Hemitelia, It. Brown. — Veins simply or pinnately-forked ; vemdes free, or the inferior ones 
angularly anastomosing, forming a costal arch and other areoles between the sinus and midrib of the 
segments. Sori medial, uniserial, submarginal, or irregular ; recepitacle globose ; indusium semi- 
calyeiform, interiorly attached. 
82. Alsophila, jR. Rrotow. — Veins pinnately costceform ; venules simple or forked, direct, free. 
Sori round or sub-globose, sometimes becoming confluent, medial or axillary, naked or furnished with 
a lateral interior indusium, which is sometimes very small or hair-like. 
