PHILIPPINE SPECIES OF DRYOPTERIS. 
209 
“A representative of the chiefly American group of R ephrod/ium opposilum 
(Sw.) Diels (N. contermmum Desv.) from which it differs mostly in the medial 
instead of submarginal sori. It is very common on rocky banks submerged 
during floods.” 
Mindanao, District of Davao, Catalonan (940 Copeland) April, 1904; Davao 
( Copeland ) April, 1904: Province of Zamboanga, San Ramon (1555 Copeland) 
December, 1904. Luzon, Province of Rizal, Bosoboso (1084 Ramos) July, 1900; 
Ardmbibi River (Loher) March, 1893; Montalban (Loher) 1900: Province of 
Batangas, Santo Tomas (2000 Copeland) February, 1906: Province of Benguet, 
Baguio (167, 258 Topping) January, 1903; Sablan (6178 Elmer) April, 1904; 
Baguio (5010 Curran) August, 1906; (6577 Elmer) June, 1904: Province of 
Cagayan (Warburg) ■ (119 Bolster) July, 1905: Manila (Rothdauscher) 1879 
in Herb. Monac: Province of Zambales, Pinatubo (Loher) February, 1906. 
This species has been known to me for a long time, but was considered as 
Lastrea ligulata 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 cuneate and decurrent, 
and by its light green color and more firm texture. Its affinity is with D. 
Koordersii Christ 8 of Celebes, but that species is distinguishable by its very 
peculiar indusium which I have described as follows: “Indusio subgloboso lateral- 
iter inhaerente duro erustato valde eonvexo brunneo nitido adiaphano sorum 
margine deflexo (more Matonice) tegente.” • 
50. Dryopteris quadriaurita n. sp. 
Rhizomate uti videtur obliquo coma squamarum subulatarum fere 1 
cm. longarum rigidarum opacarum castanearum coronato, frondibus sub- 
solitariis ant paucis, stipite 33 cm. longo nudo griseo-stramineo tereti 
pennae eorvinae crassitie, fronde 35 cm. longa 24 cm. lata deltoideo- 
oblonga versus basia vix attenuata, pinnis ca. 15 utrinque infra apicem 
pinnatifidum sessilibus inferioribus oppositis, infimis declinatis, acumi- 
natis 12 cm. longis, 2.5 cm. latis ad rbachim incisis horizontalibus remo- 
tiusculis, pinnulis linearibus, sinu acuto inter jecto, acutis, integris, 14 
mm. longis, 3 mm. latis, inferioribus liberis, falcatis, infimis rhachi 
incumbentibus auctis incisis stipulaceis, cos.tis brevissime puberulis, cum 
costulis stramineis, nervis liberis simplicibus obliquis 8 ad 10 utrinque, 
soris impressis mediis m-inutis 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 pinme cut to the costa and furnished 
at the base with incised stipules, the pinnules coriaceous, linear, their margins 
entire, the nerves simple, the sori small. It differs from D. patens in its narrow 
linear segments. 
s Ann.. Jar d. Bot. Buitens. 1 5 1 : 128. 
