312 
KEYS TO THE FERNS OF BORNEO 
d*. Cell-walls uniform 
b i. Frond not a succession of part-fronds. 
6. T. Ttysmanni. 
c. Frond roundish, segments radiate. 
d. Segments about i mm. wide, 
numerous 
d l . Segments about 2 mm. wide 
7. T. parvulum. 
8. T. nitidulum. 
a. Frond elongate-deltoid, central seg¬ 
ment monopodial 
9. T. Brooksii. 
ai. Margin ciliate. 
b. Lips of indusium glabrous 
Lips of indusium ciliate 
10. T. digitatum. 
11. T. pahnatifidum. 
4. T. MINUTUM Bl. 
Dutch Borneo. 
Malaya to New Guinea. 
5. T. PROLIFERUM Bl. 
Sarawak, Kinabalu. 
Malaya to India. 
6. T. TEYSMANNI V. d. B. 
Dutch Borneo (Bengkarum). 
Sumatra. 
7. T. parvulum Poir. 
T. saxifvagoides Presl. 
Sarawak. 
Range wide but uncertain. 
I have followed Hooker in construing this species, 
and may have a form of T. minutum in the place of real 
T. parvulum. T. saxifvagoides is a Philippine plant, of 
which the type collection cannot be distinguished by any 
constant character from Hooker’s T. parmdum. 
8. T. nitidulum v. d. B. 
Kinabalu. 
Java, Riouw. 
■9. T. brooksii Copel. n. sp. 
Sarawak (Bungo range). 
Local. 
10. T. DIGITATUM Swtz. 
Sarawak, North Borneo. 
Malaya to Mascarenes, India, Polynesia and 
Australia. 
