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T H E G E N E R A OF F E R N S
OF SOUTHERN INDIA.
a i i f i t t , ( aí i í t
FiHCALEB.—Acrogenous plants, with <lorsal or marginal one-oclled spore-cases.
l> p „ , . o a s « f ,m m h e d ,nth «jointed ring, which n m m llp nearly complete, eomcHmet rudh
Spore-cascs not vaivate.
King vertical, nearly complets, Spore-cases nsnally stalked, gibbous, bnrating transversely.
Eeoeptaoles u n iv e rs a l, i.e., occupying almost or quite the entire disk ot the fertile fronds,
both veins and parenchyma.
Eeoeptaoles Local, circumscribed, i. e , confined to determinate parts of the veins, definite in
form.
Soti transverse to the veins (when distinct veins ai-e present) ; parallel or sub-parallel with
the midrib or margin ; more or less elongated, usnaUy linear, ocoasionally oblong or
Innately om-vod ; rarely punctiform (then maa-ginal ivith transverse indusia.)
[a 11 Kcoeptaclos seated on or approiimate to the midrib, therefore costal or subnostal (often at
the same time marginal by the contraction of the frond) ; linear or oblong.
(a) Sori linear superficial iudusiate.
tJ3) Sori linear or oblong, superficial or immersed, non-iudusiate.
[o 2] Receptacles marginal or anb-marginal, (rarely medial) always remote from the midrib, usually
linear ; sometimes oblong or punctiform.
(a) Sori non-indnsiate, (mostly.ooonpying a groove or furrow, sometimes superficial), linear,
(a) Sub-marginal (often seated in a shallow dorsal furrow.)
{S) Marginal (always in an estorse marginal furrow.)
( t) Sori indusiate, superficial, (linear, oblong or rotundate.)
(a) Indusium bursting along its outward margin, attached interiorl»,
( ^ Indusiuin bui'sting along its outward margin, attached esteriorly,
Keceptaolcs rosupinate, i. a, the Sporemasea attached on the under surface of the indusinm.
Oi'cler.
POLYPODIACEÆ.
Tribe I.
PnLÏFOUlNEÆ.
§ 1.
Acrostiche»;.
Lomarieíc.
§3.
Plenrogramoeeæ.
Taeùitideæ,
§5.
Vittarieæ.