156 



Mindanao. Zamboanga, San Ramon, Copeland I7U7. Ad terrain ripariatn, 

 alt. 800 in. 



Both tliis and the preceding species are variable, especially in the ba&iseopic 

 development of the lowest pinnae, but they do not appear to blend, though the 



otber. usually more stable difference* in the shape of the sorus, apices of 1 lie 

 pinna- and anastomosing of the veins are all dependent on the lesser dissection 

 of the frond of 8. pOchyBOTO, Dried specimens of both are almost papyraceous, 

 but when fresh they are 0.5 mm. thick. The receptacle is an additional 0.5 nun. 

 in depth. 



PTERIS Linn. 



Pteris pluricaudata Copeland n. sp. 



Rhizomate subnullo, paleis lanceolato-setaeeis cinnamomeis 1-2 nam. 

 longis coronato; stipitilms confertis, 10-25 cm. altis, gracilibus, erectis, 

 glabris, pedibus Bparsissime setaceis, rubm-stTamineis; fronde plerumque 

 pedata, orbiculari-ovata, ca. 15 cm. longa; pinna utroqne una vol in 

 i'rondiluis majoribus duabus, infimis furcatis. fere vol usque ad rbacbin 

 pinnatis; pinnulis proximis, lincaribus, 8.5-3 nun. latis, fertilibua vi\ 

 angustioribus, obtusis, sterilibus serrulatis, terminalibus valde attenuatis, 

 papyraeeis, venis conspicuis, furcatis, supra albo-setaceis, alioquin glabria : 

 sons apices non attingentibus. 



.Mindanao, Zamboanga, San Ramon, Copeland 1651 (type)- Ad terrain infer 

 Cyatheas, 500 m. b. m. Luzon, Tayabas, Atimonan, Whitford 62S. 



In form this resembles tlte sterile frond of P. greviUeona Wall. (Cf. Clarke. 

 Ferns of M. India. Trans. Linn. Soc. 1: Plat< 54), but it is not dimorphous, and 

 differs further in the very evident venation, with white bristles. It is probably 

 a local derivative of P. ([uadriaurita, which is rarely without bristles in the 

 southern Philippines. 



Pteris caesia Copeland n. sp. 



LMiizomatc breve, erecto, 5 nun. erasso ; stipitibus caespitosis, stramineis 

 vol brunneis, basibus pnleis fuscis filiform ibus <S mm. longis densissimo 

 vestitisj Bursum rhachique sub lente puberulis supra canaliculatis ; fronde 

 20-35 em. alta, 10-18 cm. lata, bipinnata; pinnis 1 cm. latis, acuminatis, 

 infimis furcatis, apicalibus maximis, omnibus fere vel usque ad eostum 

 pinnatis. sinuous clansis: pinnulis ea. 1.5 mm. latis. obtusis, integris, 

 subauriculatis, papyraeeis, supra caesiis, infra pallide viridibns; costis 

 venisque supra spinescentibus ; Boris an^nstis. 



Mindanao. Davao, prope inontem Apo, Copeland 1515, 963. Ad rimaa saxorum, 

 800 m. s. m. 



A relative of P. </ii<idriiiurita Retz., distinct enough to constitute a good species. 

 The dense, acicular. sometimes twisted basal chaff, narrow pinnae, pinnules 

 widened enough to overlap at the base, and very pale upper surface are prominent 

 characters. The spincdike 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 1 refer to P. quadriaurHa. Dr. Christ points out that this 

 species is near /'. fnrcala l?aker, of Borneo. 



