156 
Mikdanao, Zamboanga, fSan Ramon, Copclund 1107. Ad teiTam ripariam, 
alt. 800 m. 
Both tills and the preceding species are variable, especially in the basiscopic 
develojmient of the lowest pinnae, but they do not appear to blend, though the 
other, usually more stable differences — in the shape of the sorus, apices of the 
pinnie and anastomosing of the veins — are all dependent on the lesser dissection 
of the frond of »S'. pachi/sora. Dried specimens of both are almost papyraceous, 
but when fresh they are 0.5 mm. thick. The receptacle is an additional 0.5 mm. 
in depth. 
PTERIS L inn. 
v/ Pteris pluricaudata Copeland n. sp. 
lihizomate sulniiillo, paleis lanceolato-setacois ciiinamomeis 1-2 mm. 
longis coronato ; stipitilnis confertis, 10-25 cm. altis, gracilibtis, erectis, 
g'labris, ])edil)us sparsissime setaceis, niltro-stramineis; fronde ])lenmique 
liedata, orbiculari-ovata, ca. 15 cm. longa; ]iinna ritroque iina vel in 
ti'oiidilnis majorilius duabus, infimis fnrcatis, fere vel usque ad rhacliiu 
pinnatis : pinuulis proximis, liuearibus, 2.5-3 mm. latis, fertilibus vix 
aug'ustioribus, olitusis, sterililius serrulatis, termiualibus valde atfeuuatis, 
papyraceis, veuis cous})icuis, furcatis, supra albo-setaceis, alioquiii glaluds ; 
soris apices uou attiugeutilms. 
MiNUAXAd. Zamboanga, San Ramon. Copeland 1(551 (type). Ad terrain inter 
Cyatheas, 500 m. s. m. Luzon, Tayabas, Atimonan, Whitford (528. 
In form this resembles the sterile frond of P. grevilleana Wall. (Cf. Clarke, 
Ferns of N. India, Trans. Linn. Soe. 1: Plate 51i), but it is not dimorphous, and 
differs further in the very evident venation, with white bristles. It is probably 
a local derivative of P. quadrumrita , which is rarely without bristles in the 
southein Philippines. 
\J Pteris caesia Copeland n. sp. 
Ebizomate breve, erecto, 5 mm. cras.so; stipitibus caespitosis, stramineis 
vel lu'uuneis, liasibus paleis fuscis filiformibus 8 mm. longis densissime 
vestitis, sursum rhacbique sub leute ]uiberulis supra caiialiculatis ; fronde 
20-35 cm. alta, 10-18 cm. lata, bipiuuata; piuuis 1 cm. latis, acuminatis, 
infimis furcatis, apicalibus maximis, omnibus fere vel usque ad costam 
]dnnatis, siuubus clausis ; jiiuuulis ca. 1.5 mm. latis, obtusis, integris, 
subauriculatis, pa])yraceis, supra caesiis, infra pallide viridibns; costis 
venisfpic supra spinescentibus ; soris angustis. 
Mindanao, Davao, prope montem Apo, Copeland 1515, 963. Ad rimas saxorum, 
800 m. s. m. 
A relative of P. quadriaiirita Retz., distinct enough to constitute a good species. 
The dense, aeicular, sometimes twisted basal chaff, narrow pinna?, pinnules 
widened enough to overla]) at the base, and very ]?ale upper surface are prominent 
characters. The spine-like trichomes on the veins are more conspicuous than 
in any of its relatives in my possession; but such structures are present on a 
majority of the forms I refer to P. qnadriaurita. Dr. Christ points out that this 
species is near P. f areata Baker, of Borneo. 
