86 
(3.) Sori 2^^tnctifo7'm, dr., dx. 
( C.J Sori involucrate, i. e., ivith inferior indusia. 
(b.J Special indusiiim, more or less adherent to, and connivant u'itlh the margin of the frond, forming an entire or ^-valued cup ; 
sori, therefore, within amai-ginalcup. 
(TKIBE 1, § 20,) DICKSONIEvE. 
( a. J Indusium cup-shajJed, refiexed. 
Dennsmdtia. Bernhardi. Schrad. Journ. 1800, ii, 124, t. \, f 3. 
(Dicksonia, Kaulfuss, Presl. ; — Sitobolium, Desvaux. ; — Patania, Presl. ; — Sitobolium, J. Sn, ; — Adectum, Link. Depari;e 
pp., Hooker ; — Polypodii. sp., Auct. ;— Cyathere sp., Anct. ; — Tricliomanes, Anct. ; — Nephrodii sp., Auct.) 
Sori iuvolucrately-indusiate, globose, marginal refiexed, the receptacles small, punctiform terminal ; Indusium, cnpuliform or 
pateriform, sub-membranaceous, the special and accessory valves nearly equal, and coalescing into an almost entire, rarely sub-bilabiate 
refiexed cup. Veins pinnate from a central costa, venules simple or forked free. 
Fronds herbaceous, bi-pinnate or decompound, the sori exerted within the cup-shaped involucriform indusia, and refiexed. 
Pihizome creeping. This genus differs from Dicksonia in a cup-shaped entire, instead of a 2-valved indusium. (Moore.) 
1. Dennsta^dtia deltoidea. (Moore.) Stipes 6-8 inches long, a little rough, glossy brown, fronds deltoid-ovate, 1 foot long, 
quadripinnate, pinnules oblong-cuneate, pinnatifid, the segments linear obtuse few on a winged rachis, sori terminal upon the shorter 
segments, rachises (the main one zigzag) costie, and frond (in a slight degree) hairy. Hook. — Davallia deltoidea, Hook. Sp. Fil. i, 80. 
Ceylon. (C. P. 1397.) 
PLATE No. CCLVIII. 
Note. — Mr. Moore enumerates two other species from Ceylon, viz., D. flaccida and scabra. Mr. Thwaites says he does not 
know them unless they are forms of the above, nor does he know anything of Dicksonia Zeylanica, (Sw.), unless it is also the same as 
Dennstoidtia deltoidea. 
Cyathea. (See page 19.) 
C'l/athea sinuata. (Hook, et Grev.) Caudex 1 inch in diameter, fronds simple, lanceolate, very much elongated, sinuate at the 
margin, veins pinnate, veinlets soriferous near the middle, involiicre globose or slightly depressed, bursting very irregularly at the top, so 
as to become cup-shaped with a very uneven margin, receptacle globose. Hook. Sp. Fil. i, 15. 
Ceylon. (C. P. 3052.) 
PLATE No. CCLIX. 
2. Cyathea Hookeri. (Thw.) Caudex elongate, about \h inch in diameter, stipites sparingly muricated at the base and furnished 
with rather rigid setosely acuminated scales, fronds 3 feet or more long, narrow, lanceolate acuminate, pinnate, pinnatifid at the apex, 
pinnae lanceolate, sub-entire or crenately lobate, and broadly truncate at the base, shortly petiolate, superior sessile, inferior gradually 
smaller, costa beneath sparingly paleaceous, veins pinnate, indusium globose, bursting irregularly. Thw. En. PI. Ceijlou, part V. 
Ceylon ; Singhe-Pvajah Forest. (C. P. 3722.) 
PLATE No. CCLX. 
3. (Jyathea Walkerce. (Hook.) Unarmed, stipes and main rachis mahogany coloured-fronds bi-pinnate, pinnules thick, firm, 
very coriaceous, deeply pinnatifid, pinnate below, segments and ultimate pinnules (the latter contracted at the base) oblong, very obtuse, 
entire or slightly crenate, often scaly, (scales deciduous) on the costa beneatli, veins copious, sunk, forked at the very base, often again 
about half way up, sori occupying the lowest fork close to, almost upon the costa, involucres large, opaque, bursting, as it were, on the 
superior side, only refiexed upon the costa, and partially covering the sorus in the form of a broad bifid hood. Hook. Sp. Fil. i, 24. 
