KEYS TO THE FERNS OF BORNEO 
405 
96. P. NIGRESCENS Bl. 
Common. 
Malaya to India and Polynesia. 
This and the preceding species are different enough 
in Java, but hard to distinguish in Borneo and the 
Philippines. 
97. P. INCURVATUM Bl. 
Sarawak, Dutch Borneo, North Borneo. 
Malaya. 
98. P. subaquatile Christ. 
Dutch Borneo. 
Endemic. 
99. P. ALBIDOSQUAMATUM Bl. 
Sarawak, Dutch Borneo. 
Malaya, New Guinea. 
Subgenus IV. SELLIGUEA. 
a. Not coriaceous in texture. 
b. Fronds less than 3 cm. wide. 
c. Rhizome covered with small scales. 
scandent 100. P. Selliguea. 
a. Rhizome nearly naked 101. P. fluvintile, 
b 1. Fronds more than 3 cm. wide. 
c. Fertile frond much shorter than sterile 102. P. regulare . 
c*. Fertile frond not much shortened. 
d. Frond thin, stipe (at least of fertile 
frond) long. 
e. Palese blackish 
e*. Palese brown 
103. P. in terrup turn. 
104. P. macrophyllum . 
105. P. Hosei. 
106. P. loxogvammo ides. 
rfi. Texture firm, stipe short 
Subcoriaceous, stipe winged 
a,2. Coriaceous; stipe not winged. 
b. Sori superficial 
b 1. Sori immersed 
107. P. Feei, 
108. P. wettenianum. 
100. P. Selliguea Mett. 
Sarawak, Dutch Borneo. 
Malaya to Queensland. 
