178 E. B. CnpELAXi) : 



variiis simplici. plerumqiie piuiiata, 4 — 8 (rarius ultra) cm 

 l()ii,i;;i, liucaii. laiiceolata, oblanceolata, acI ovata, lamina mem- 

 braiiacca, glabra; pinna terminali vulgo valde producta, an- 

 gusta, prolifera; pinnis lateralibiis 2 — 6-jiigatis, orecto-paten- 

 tibus, vulgo obovatis, rarius orbicularibus vel lanceolatis, obtusis, 

 integi'is vel rarius serratis, sessilibus, ])lus minus decurrentibus; 

 venis inconspicuis, areolis ])arcis, voiuilis inclusis cai'entibus; 

 J'nmde fertili lincari: j)innis 2 — -l-jugaris, romotis. infimis in- 

 terdum ])etioIulatis, orbicularibus vel oblongis, integris, 1 — 4 mm 

 longis; venulis ])arcis vol nidlis; pagina tota sporangiis obtecta. 



Luzon I si., P]'uv. Bataan, Lamao River, on moist stones 

 (CoPEj.zVND no. 251, Merrill no. 3128). 



This exceedingly variable fern is locally common, fruiting 

 tluoughout the year. It completely covers boulders in the beds 

 of the Lamao and its branches. Its small size and individually 

 lax but collectively dense habit distinguish it well fi'om all of 

 its pinnate relatives. 



Arthropteris J. Sul 

 1. Arthropteris glabra Copeland n. sp. Khizomate tenui, scan- 

 donto, paleis nigris adpressis vel basibus earum sparse vestito; 

 stipite brevissimo, 1 — 2 mm supra rhizoma articulato: fronde 

 20 — 30 cm alta, 5 — 7 cm lata; pinnis ca. 8mm latis. obtusis 

 vel superioribus subacutis, obscure crenatis, subauriculatis. 

 papyraceis, glabris, siccis viridibus; soris orbicularibus a mai- 

 gine I'emotis; indusio sinu angusto affixo, diu persistente. 



Palauan Is!., near Ewiig River, on the trunlcs of trees 

 (Merrill no. 740). 



Filix a speciebus affinibus j)inuis glabris et indusiis per- 

 sistentibus valde distincta. 



Nephrolepis Schoit. 

 1. Nephrolepis l>arhata Copeland u. sj). KMiizomato brovi, >\\h- 

 ereeto, radices suffulcientes multas cmittciitc: stipitil)us con- 

 fcrtis subeiT'ctis, validis, 10 — 15 cm altis. doDisum s(|uamulis 

 lanccohitis fuscis liyalinD-marginatis vcstitis, sui'>um glabn»- 

 scentibus; fronde lineari, 50 em vol ultra longa, S em lata, 

 pinnata; rhaehi l)runii('a. nitento, s(iuamuli> minutis deorsum 

 patentibus sparse vostita: pinnis majorilius >t('rilil)us 35x10 mm, 

 aeutis, integris, fertilibus 50 x 7 niiii. acuminatis, a])ices versus 



