386 
KEYS TO I'HE FERNS OF BORNEO 
48. STENOCHLAENA J. Smith. 
a. Margin of pinna spiny i. S. palustris. 
n 1 . Margin not spiny 2. S. sorbifolia. 
1 . S. palustris (Burm.) Bedd. 
Common. 
India to Polynesia and Australia. 
2 . S. sorbifolia (L.) J. Sm. 
Probably common. 
“ Pantropic.” 
Ferns given this name occur throughout the Tropics, 
and the failure to distinguish between them makes it 
simply impossible to state the range of various of the really 
good included species. Miquel cites S. cochinchinensis 
from Borneo (Dutch Borneo), Sumatra and the Moluccas; 
but Christensen's Index gives only Cochin China. Van 
Alderwerelt determines a specimen from Dutch Borneo as 
S. Smithii (Fee) Und., previously known from the 
Philippines. The same author describes S. abrupta from 
Dutch Borneo and Amdyah, but says nothing about the 
fertile fronds, which need to be taken into account in 
making a key for this group. 
49. BLECHNUM Linnaeus. 
a. Fertile and sterile fronds or pinnae similar Eublechnum. 
b. Pinnae broad, entire, large ferns. 
c. Pinnae narrowed to the base 
re Pinnae broad at base 
& 1 . Pinnae finely serrate 
41. Fertile pinnae much contracted 
b. Fronds simple or pinnate. 
c. Simple or with broadly adnate pinnae 
a. Pinnae truncate or cordate at base. 
d. Rachis and stipe (except base) nearly 
smooth 5. B. procerum. 
d*. Rachis and stipe scaly 6. B. vestitum. 
b 1 Fronds deeply bipinnatifid 7. B. Fraseri. 
3 . B. finlaysonianum Wall. 
Common. 
Penang to Basilan, New Guinea. 
1. B. finlaysonianum. 
2. B. orientate. 
3. B. serrulatum. 
Lomaria. 
4. B. Patersoni. 
