KEYS TO THE FERNS OF BORNEO 
335 
16. P. purpu reorach is Copel. n. sp. 
Kinabalu. 
Local. 
17. P. biaurita L. 
North Borneo. 
Distribution wide, but uncertain. 
18. P. wallichiana Agardh. 
Sarawak. 
Malaya to India and Samoa. 
19. P. tripartita Sw. 
Sarawak, North Borneo; probably common. 
Palaeotropic. 
P. mertensioides Willd. is a doubtful plant, referred 
to Borneo, Java and Amboyna in Christensen’s Index. 
We have three more apparently undescribed species 
in this genus. 
18 . BALANTIUM Kaulfuss. 
a. Frond very thin 1. B. Copelandi. 
a 1. Frond coriaceous 2. B.pilosum. 
1. B. Copelandi Christ. 
Sarawak (Mt. Penrissen), Kinabalu. 
Philippines. 
2. B. pilosum Copel. 
Sarawak (Mt. Batu Lawi). 
Endemic. 
19 . DAVALLODES Copeland. 
a. Indusia cup shaped 1. D.hirsutum. 
a 1 . Indusia reniform, straw-color 2. D. viscidulum. 
az. Indusia reniform, red 3. D.borneense. 
1. D. hirsutum (J. Sm.) Copel. 
Sarawak, Dutch Borneo and British North Borneo. 
Philippines, Celebes. 
The Kinabalu specimen is not typical, and more 
ample collection is likely to show that it is a distinct 
species. 
