Ferns. 



189 



This is the smallest PohipocUmn. The largest fronds are 

 23 mm long and less than 2 mm liroad. Tlu^ caudicos are less 

 than 5 mm high, and, including the leaf -bases, 1,5 mm thick. 



2. Polypodiuiu pleiosoroides Copeland n. sp. Caudice brevi, re- 



pen te, squamulis late lanceolatis acuminatis, stramineis vestito; 

 stipite tenni, 2 — 4 cm longo, pilis stramineis 0,4 mm longis, 

 divergentibns dense vestito; fronde lanceolata, 10— 15 cm alta, 

 10 — 15 mm lata, utrinque attennata, coriacea, ambabus faciebus 

 glabra, margine praecipue deorsam sinuato, pilos breves, par- 

 cissimos ferente; nervis lateralibus (totis) liberis, immersis, in- 

 conspicuis, pinnatis vel ca. 4-fnrcatis; soris rotundis, magnis, 

 superficialibus, vix confluentibns, in 1—3 lineas irregulares 

 instructis vel potius sparsis, receptaculis oblongis. 



Mindanao IsL, Mi Apo, on the mossy trunks of trees, 

 1800 m. s. m. (Copeland no. 1011). 



A P. 2??6??osoro Mett, in Tahiti et Ulaitea lecto, cni affine, 

 squamis rhizomatis latioribus, fronde oculo nudo ubique glabra 

 et soris magnis satis distinctum. 



3. Polypodiimi gracillimmii Copeland n. sp. Rhizomate repente 



vel adscendente, paleis minutis, fuscis, lanceolatis vestito; fron- 

 dibus confertissimis, ubique glabris, in segmentis minutis, acutis 

 remotis, erecto-patentibus, decurrentibus, alternantibus fere ad 

 rhachin pinnatifidis ; rhachi viridi utrinque alata; soro in 

 uno quoque segmento uno, medio dorsali; lamina segmenti 

 conduplicata, parte inferiore sorum protegente. 



Mindanao IsL, Mt. Apo, on the mossy trunks of trees, 

 in a moist forest, 1800 m. s. m. (Copeland no. 1007). 



Larger fronds 12 cm long, 4mm wide, almost sessile. The 

 very small and widely separated segments give the frond the 

 aspect of a leafy liverwort. It grows with its nearest relative, 

 P. cucuUatum Xees. 



4. Polypodiuiu luacrum Copeland n. sp. Rhizomate brevi, erecto, 



radicibus, basibus frondium emortuarum squamulisque fuscis 

 densissime obtecto; frondibus confertis, brevi -stipitatis, linear! - 

 lanceolatis, curvis, acutis, pinnatis; stipite fusco-nigro, pilis 

 concoloribus 1 mm longis vestito, rhachi eosdem sparsius 

 ferente, lamina glabriuscula; pinnis angustis, subacutis, undu- 

 latis, subfalcatis, decurrentibus, sursum confluentibus, deor- 

 sum remotis, minusculis; soris ellipticis vel subrotundis, ad 



