PHILIPPINE SPECIES OF DUYOPTEJIIS. 
209 
"A representative of the chiefly American group of Nephrodium opposilum 
(S\v. ) Diels [N. contermmum Desv.) from wliich it differs mostly in the medial 
instead of submarginal sori. It is very common on rocky banks submerged 
diiring floods." 
Mi.\uA>-Ao, District of Davao, Catalonan {940 Copcland) April, 1004; I>uvao 
(Copeland) April, 1904: Province of Zamboanga, San Ramon (1555 Copeland) 
December, 1904. Luzon, Province of Rizal, Bosoboso (1084 Ramos) July, lOOfi; 
Arambibi River {Lokcr] March, 1893; Montalban {Loher) 1900: Province of 
Butangas, Santo Tomas (2000 Copcland) Febiuary, 1900: Province of Benguet, 
Bnguio (167, 258 Topping) January, 1903; Sablan (6178 Elmer) April, 1904; 
Baguio (5010 Curran) August, 1906; (6577 Elmer) June, 1904: Province of 
Cagaj-an (Warburg); (119 Bolster) July, 1905: Manila {Rothdauscher) 1879 
in Herb. Munae: Province uf Zambale^, I'inniiibo {Loher) February, 1900. 
This species has been known to me for a long time, but was considered as 
Lastrea ligulafa J. Sm. It is described here from tbe 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. Tbe plant can always 
be readily distinguished from />. immersa and D. ligulala (whicli to me are not 
specifically distinct) by its very sharp segments, whicli are cuneate and decurrent, 
and by its light green color and more firm texture. Its affinity is with /). 
KoordersH Christ ^ of Celebes, but that species is distinguishable by its very 
peculiar indusiuni which I have described as follows: "Indusio subgloboso hiteral- 
iter inhaerente duro crustato valde convexo brunneo nitido adiaphano sorum 
margine deflexo (more Matoniw) tegente." 
50. Dryopteris quadriaurita n. sp. 
w 
Rliizomatc uti videtur obliquo coma squamarum subulatarum fere 1 
em. longarum rigidarum opacarum castaneariim coronate, frondibiis sub- 
solitariis aiit pauciSj stipite 33 em. longo nudo gritsoo-stramineo iereti 
pennae corvinae crassitie, fronde 35 em. longa 24: cm. lata deltoideo- 
oblonga versus basia vix attenuata, pinnis ca. 15 iitrinqiie infra apicem 
pinnatifidum sessilibus inferioribus oppositis, infimis declinatis, aeumi- 
natis 12 em. longis, 2.5 cm. latis ad rliachim incisis horizoutalibus reino- 
tiuseulis, j^innulis linearibus, sinu acuto interjecto^ acutis, integris, 14 
mm. longis, 3 mm. latis, inferioribus liberis, faleatis, infiniis rhachi 
incumbentibus auctis incisis stipulaccis, costis brevissime puborulis, cum 
costulis stramineis, nervis lilwris simplicibus obliquis 8 ad 10 utrinque, 
soris impressis mediis minutis exindusiatis. Textura coriacea, rigida, 
colore laete virente. 
Mindanao, Province of Zaml)oanga, San Ramon (1714, 1713 Copeland) April, 
1905, alt. 850 m. 
A species with the appearance of Ptcris quadriaurita Retz., the fronds not 
fasciculate, bipinnate, deltoid-oblong, the pinnie cut to the costa and funuslied 
at the base with incised stipules, the pinnules coriaceous, linear, their miu-^'ins 
entire, the nerves simple, the sori small. It differs from /). patens in its narrow 
linear segments. 
Mnn. Jard. Hot. Buitenz. 15': 128. 
