163 



10-12 mm. latifc, integris vol undulatis, acnminatis ; sinubua quam basi- 



bua segmentorum latioribus; venulis in reticulum perlaxam anastomo- 

 santibns, venulis inclusis paucis; soris sparsis vel irregulare instruct is, 

 orbicularibus vel oblongis, superficialibus. 



Mindanao, Zamboanga, San Ramon, 800 m. s. m., Copcland 1717. 



This fern suggests P. insigne Blume, and is more like the original than more 

 recent descriptions of that species. It is well distinguished hy its slenderness. 

 segments connected by a wing instead of directly confluent, briefly decurreut base, 

 and lax venation. 



Polypodium ( Phymatodes) rivulare Copeland n. sp. 



Kbizomate repente, 1.5-2.5 mm. crasso, paleas sparsas lanceolatas acu- 

 minatas atras fereute, carnoso, sicco fragile, interdum viride; stipitibus 

 5-10 em. altis, glabrescentibus, stramineis, supra anguste alata, pede 

 exalato 1-5 em. alto; fronde 10-1 (i em. alta, late ovata, ad alam pinnis 

 latetudine aequalem pinnatifida, glabra, membranacea; segmentis 1-4- 

 jugatis, usque ad 7 cm. longis, 5-8 (maximis 14) mm. latis, aeutis. 

 integris vel undulatis, segmento terminale plerumque Jongiore; venis 

 irregulariter eonfluentibus, omnibus (eostis exceptis) inconspicuis; soris 

 1-1.5 mm. latis, irregulariter sparsis. 



Luzon, Laguna, Los Bafios, Copcland 2021. Ad saxa rivularia ; Katanga s. 

 nionte Malarayat, Copeland 1998. 



The smallest and most delicate species of the natural group of P. pteroput BL 

 and P. insigne BL, remarkable because the midribs of the segments have no 

 branches visible by reflected light. Judging by the description alone, P. penta- 

 phyllum Baker is a decidedly larger and coarser fern, with shorter stipe; and 

 its rhizome is said to be woody. 



Polypodium (Phymatodes) phanerophlebium Copeland n. sp. 



libizomate scandente, 15 mm. crasso, radices permultas emitted I e. 

 squamis ovatis vel orbiculatis peltatis integris imbricatis persistentibua 

 5 mm. longis vestito; stipite glabro, 40-80 cm. alto, 7-10 mm. crasso, 

 supra canaliculate; fronde ea. 1.5 m. alta, GO cm. lata, glabra, herbacea 

 vel subcoriaccn, pinnatifida ; segmentis majoribus 35 cm. longis, 45 mm. 

 latia integris, acuminatis, ala 10-15 mm. lata connexis; venis praecipuis 

 areolas primae ordinis includeutibus perconspicuis, infra exstantibus, mar- 

 ginem non attingentibus; venatione ultima Polypodii affinis; soris magnis, 

 ;}-5 mm. latis, vi\ immersifl, plerumque biseriatis, in areola grande 

 quaque uno. (Tab. 24.) 



-Mindanao, Davao, nionte Apo, Copeland 1550. In arboribua epiphyticum, 1,200 



m. s. m. 



Near P. afflne Blume', but larger and stouter, with conspicuous venation, most 

 distinct in the clothing of the rhizome. 



The real nature of Blunie's Polypodium afflne is not absolutely clear. The 

 original description, in Flora Javae, 2: 100, is: "Filim mirifica, sacpe orgi/alis 

 et altior." * * * 'Caudex as thick as the little finger, • * • dull green, 

 entirely naked or with scattered solitary peltate dark-brown resinous-shining 

 remnants of scales. * * * Fronds H to nearly 3 feet high, 10 to 16 inches 

 broad, oblong, acuminate, decurrent, membranaceous, glabrous, black-punctate 



