PHILIPPINE SPECIES OF DRYOPTERIS. 
213 
plant is small ( always ? ) , with deltoid fronds, the sterile ones irregularly lobed. 
It has the appearance of the forma Heleopteris of D. filix mas. The presence of 
this member of the filix mas group augments the continental and temperate 
element in the mountains of northern Luzon, already known to be of considerable 
magnitude. 
63. Dryopteris Balabacensis n. sp. 
Ampla, stipite pennae anserinae crassitie, 55 cm. longo, angulosa, 
nuda uti tota planta, cum rhachibus rufocastanea sive rufostraminea, 
fronde tripinnata deltoidea 50 cm. longa et aequaliter aut latiore, basi 
tripartita, pinnis 8 ad 10 infra apicem pinnatifidem valde remotis 
(primo interstitio 14 cm. longo) petiolatis, petiolo infimarum pinnarum 
5 cm. longo, pinnis infimis 30 cm. et ultra longis basi ■ 25 cm. latis, 
deltoideis, postice acutis, pinnula infima posteriore 13.5 cm. longa 
et 7 cm. lata, pinnulis in incisolobatis, ovato-oblongis 2 cm. latis 4 ad 5 
cm. longis obtuse lobatis, pinnis superioribus sessilibus oblongis acumi- 
natis, ad basin usque ad costam incisis versus apicem lobatis, lobis 
extremis postice decurrentibus, oblongis acutiusculis, 8 mm. latis sinubus 
acutis dentatis, dentibus decumbentibus, nervis in lobis pinnatis et bi- 
aut trifurcatis, manifestis. Textura coriacea, colore ochreo-viridi, niti- 
dulo, costis rufostramineis faciebus glabris, soris minutis numerosis 
submarginalibus mediisve, indusio nigro coriaceo-carnoso reniformi mox 
convolute persistente praeditis. 
Balabac (392 Mangubat ) March to April, 1906. Palawan (698, 712, Fox- 
worthy) March to April, 1906. Sibuyan (25 McGregor ) July, 1904. 
This species belongs to the D. sparsa group but is larger than that species, 
its pinnae long stipitate, the base of the frond strongly tripartite, the basal pinnae 
usually large and compound like the rest of the frond, stipe glabrous, indusium 
fleshy, convolute, black. It has the appearance of Sagenia, but the nerves are not 
united. 
64. Dryopteris sparsa (Don) 0. Ktze. Rev. Gen. PL 2 (1891) 813. Nephro- 
dium sparsum Don. Prodr. FI. Nepal. (1825) 6. 
Luzon, Province of Benguet, Baguio (282 Topping ) January, 1903. Palawan 
(672 Foxworthy) March to April, 1906. Mindanao, Province of Zamboanga, San 
Ramon (1727 Copeland) April, 1905. 
Widely distributed in tropical Asia. 
65. Dryopteris purpurascens (Blume) Nephrodium purpurascens Blume 
Enum. 169; Mett. in Ann. Lugd. Bat. 1: 227; Raciborski Pter. Buitenz. 174, non 
Hook. Sp. Fil. 4. t. 262. 
Dilfert a I), sparso squamis basalibus subulato-angustatis, fronde qua- 
dripinnatifida, pinnis infimis decompositis, magnitudine quadrupla. Icon. 
Hook. cit. est D. sparsa. 
Mindobo, Mount Halcon (6101 Merrill) November,' 1906. 
The species is also known from Java. 
