XM, C, 1 Copeland: New Species Borneo Ferns 63 
tianum, supposed at that time to have free veins. P. cesatianwm is described 
by van Alderwerelt as having brown paleae and the margin “slightly, not 
regularly crenate;” it may be P. coloratwm or may not; at any rate, the 
two are closely related. If P. cesatianuwm Baker is neither P. coloratum 
nor the plant collected by Hallier, it still awaits description. If all three 
are distinct, some good botanical lawyer should decide what plant should be 
called P. cesatianum. Was the type collected by Beccari or by Hallier? 
Has a nomen nudum,—such as P. cesatianum was before 1909, and under 
our strictest rules still is—and, as such, invalid, a type valid enough to fix 
the application of the name? Or could van Alderwerelt, intentionally or 
inadvertently, choose a new type specimen to go with Baker’s name? Is it 
P. cesatianum Baker or P. cesatianum v. A. v. R.? 
POLYPODIUM OCCULTIVENIUM sp. nov. 
Species P. rupestri Bl. affinis; rhizomate repente, paleis rufo- 
brunneis peltatis sub insertione non protractis supra basin an- 
guste lanceolatis apicibus longis setiformibus dense vestito; 
stipitibus approximatis, fronidum sterilium ca. 4 cm, fr. fertilium 
ca. 10 em altis, fusco-stramineis, nudis, rectis; fronde sterile 
18 ad 16 cm longa, 2.5 ad 3.5 cm lata, lineari-elliptica, integra, 
coriacea, glabra, apice rotundata, basi acuta; costa inferne pro- 
minente, venis inconspicuis; fronde fertile paulo longiore; soris 
inter venas biseriatis, multis, superficialibus. 
Sarawak, Bidi, Brooks, May, 1909. 
Polypodium rupestre Bl. differs from this in having darker, less dense, 
and less setiform paleae, acuminate fronds broadest near the base, and 
more rigid texture. 
POLYPODIUM ALBIDO-PALEATUM sp. nov. 
Species P. triquetro Bl. affinis; rhizomate repente, nigro, 
rugoso, 4 mm crasso, paleis ochroleucis vel albidis peltatis et 
sub insertione protractis anguste ovatis apicibus acuminatis de- 
ciduis donatis tum demum omnino deciduis vestito; stipitibus 
remotis, fuscis vel atro-fuscis, validis, 7 ad 12 cm altis; fronde 
25 ad 40 cm alta, 7 ad 8 cm lata, elliptico-lanceolata, abrupte 
brevi-acuminata, basi rctundata vel subcuneata, integra vel 
apicem versus subserrulata, rigide coriacea, glabra; costa et venis 
primariis praestantibus; soris parvis, inter venas biseriatis vel 
subirregulariter adspersis inter costam et marginem usque ad 18, 
superficialibus. 
Mount Kinabalu, Paka Cave to Lobang, Topping 1749 (type); Marai- 
parai Spur, Mrs. Clemens 11060. 
Polypodium triquetrum BI. has larger, darker and more persistent paleae, 
smaller and distinctly lanceolate fronds and larger and less numerous sori, 
regularly arranged in double rows. The confusion of P. triquetrum and 
P. rupestre, in various compendia, can be due only to failure to observe 
the paleae. 
