Prats 47. 
POLYPODIUM (Puymatopss) anzo-squamatum, Bi. 
White-dotted Polypody. 
Potypopium (Phymatodes) aléo-sguamatum; caudex long, stout, creeping, 
clothed with long, subulate, falcate, finely attenuated brown scales; sti- 
pites a span to a foot high, terete, purplish-brown, polished ; fronds a foot 
to a foot and a half long, broad, membranaceous, pinnated; pinne five to 
seven, all petioled, especially the terminal one, six inches to a span long, 
long-lanceolate, finely acuminate, entire at the margin, costate, veins irregu- 
larly anastomosing, so as to form large angular areoles, free only and forked 
at the margins ; these areoles include free veinlets, simple or forked, the forks 
often divaricating, their apices clavate; on the superior surface correspond- 
ing with those clavate apices, are white, cretaceous scales or dots (whence 
the specific name); sori in two lines or series on the pinna, halfway be- 
tween the costa and the margin, approximate, generally extending nearly 
the whole length of the pinna, always compital (placed on the junction of 
the reticulated veins). 
Potyropium albo-squamatum. Bl. En. Fil. Jav. p. 132. Fl. Jav. p. 187. t. 57. 
Metten. Polypod. p. 108. t. 1.,f.29 (fragment, with venation). 
PLEOPELTIS albo-squamatum. Pr. Tent. Pterid. p.193 (not Drynaria albido- 
squamata. J, Sm. in Hook. Journ. Bot. p. 397, which is Polypodium va- 
rians, B/.). 
Has. Java, Blume; Borneo, Wallace——Cultivated in the Royal Gardens of 
Kew. 
A handsome, graceful, and well-marked species, yet nearly al- 
lied to the P. varians of Blume, which Mr. J. Smith mistook for 
it in naming Mr. Cuming’s n. 286, in the ‘ Journal of Botany.’ 
The venation quite accords with the section “ Drynaria” of Poly- 
podium, here forming rather large areoles, but having free veinlets 
towards the margin : where the free veinlets terminate (and their 
apices are‘always clavate), we find on the upper side of the pinnee 
white dots, arising probably from an exudation, which deposits 
a calcareous orbicular scale or crust. Such white secretions are 
not uncommon on many tropical Ferns: to a less extent they 
are seen on Polypodium plebejum, described at our Plate 48 
(next Plate); but they are there too few and inconspicuous to 
be represented in the figure. 
Prats 47. Fertile plant of Polypodium (Phymatodes) albo-squamatum, Bl.,—~ 
natural size. Fig. 1. Portion of the upper side of a pinna, showing the venation 
and the eretaceous dots, at the margin and on the disk. 2. Under side of ditto, 
with a sorus, and the receptacle of a second, showing the compital attachment. 
8. Scale from the caudex :—all magnified. 
DECEMBER IsT, 1861. 
