PHILIPPINE SPECIES OF DRYOPTERIS. 209 



"A representative of the ehiefly American groiip of Nephrodium opposiinm 

 (Sw.) Diels {N. conterminum Desv.) from whicli it diflers mostly in the medial 

 instead of submarginal sori. It is very coramon on rocky banks submerged 

 during floods." 



jNIindanao, District of Davao, Catalonan (940 Copeland) April, 1904; Davao 

 (Gopeland) April, 1904: Province of Zamboanga, San Ramon (1555 Copeland) 

 December, 1904. Luzon, Province of Rizal, Bosoboso (1084 Ramos) July, 1900; 

 Arambibi River (Loher) March, 1893; Montalban (Loher) 1900: Province of 

 Batangas, Santo Tomas (2000 Copeland) February, 1900: Province of Benguet. 

 Baguio (107, 258 Topping) January, 1903; Sablan (6178 Elmer) April, 1904; 

 Baguio (5010 Curran) August, 1906; (6577 Elmer) Jime, 1904: Province of 

 Cagayan (Warburg) ; (119 Bolster) July, 1905: Manihv (Rothdauscher) 1879 

 in Herb. Monac: Province of Zambales, Pinatubo (Loher) February, 190G. 



This species has been knoun to me for a long time, but was considered as 

 Lastrea UguUita J. Sm. It is described here from the most common form — that 

 is, rather small specimens — although sometimes it attains a size three times 

 as large as is indicated in the diagnosis, and even larger. The plant can always 

 be readily distinguished from D. immersa and D. ligulata (which to me are not 

 specifically distinct) by its very sharp segments, which are cmieate and deeurrent, 

 and by its light green color and more firm texture. Its aflinity is with D. 

 Koordersii Christ * of Celebes, but that species is distinguishable by its very 

 peculiar indusium which I have described as follows : "Indusio subgloboso lateral- 

 iter inhaerente duro crustato vakle convexo brunneo nitido adiapliano sorum 

 margine deflexo (more Matoniw) tegente." 



50. Dryopteris quadriaurita n. sp. 



Ehizomate uti videtur obliquo coma squamarum subulatarum fere 1 

 cm. loiigarum rigidarum opacarum castanearum coronato, frondibus sub- 

 solitariis aut paucis, stipite 33 cm. longo nudo griseo-stramineo tereti 

 pennae corvinae crassitie, fronde 35 cm. longa 24 cm. lata deltoideo- 

 oblonga versus basia vix attenuata, pinnis ca. 15 utrinque infra apicem 

 pinnatifiduni sessilibus inferioribus oppositis, infimis declinatis, acumi- 

 natis 13 cm. longis, 2.5 cm. latis ad rliachim incisis horizontalibus remo- 

 tiusculis, pinnulis linearibus, sinu acuto interjecto, acutis, integris, 14 

 mm. longis, 3 mm. latis, inferioribus liberis, falcatis, infimis rhachi 

 incumbentibus auctis incisis stipulaceis, costis brevissime puberulis, cum 

 costulis stramineis, nervis liberis sitnplicibus obliquis 8 ad 10 utrinque, 

 soris impressis mediis minutis exindusiatis. Textura coriacea, rigida, 

 colore laete virente. 



MiNDANAO, Province of Zamboanga, San Ramon (1714, 1713 Copeland) April, 

 1905, alt. 850 m. 



A species with the appearance of Pteris quadriaurita Retz., the fronds not 

 fasciculate, bipinnate, deltoid-oblong, the.pinnae cut to the costa and furnished 

 at the base With incised stipules, the pinnules c^riaceous, linear. their margins 

 entire, tlie nerves siniple, the .sori small. It dift'ers from D. patens in its narrow 

 linear segments. 



^o" 



^ Ann. Jard. Bof. Buitenz. 15": 128. 



