4 10 
KEYS TO THE FERNS OF BORNEO 
8. C. beddomeanus (Gies.) C. Chr. 
Dutch Borneo. 
India, China. 
9. C. angustatus (Sw.) Desv. 
Sarawak, Dutch Borneo. 
Malaya to India and Polynesia. 
62 . DRYMOGLOSSUM Presl. 
D. HETEROPHYLLUM (L.) C. Chr. 
Common at low altitudes. 
Malaya to India and Polynesia. 
63 . HYMENOLEPIS Kaulfuss. 
a. Frond 1-3 cm. wide 
a*. Frond about 5 cm. wide 
1. H. spicata. 
2. H. callifolia. 
1. H. spicata (L.f.) Presl. 
Probably everywhere, not reported from Dutch 
Borneo. 
Palaeotropical. 
2. H. callifolia Christ. 
Dutch Borneo. 
Endemic. 
64. ELAPHOGLOSSUM Schott. 
a. Without a cartilaginous margin 
1. E. petiolatum. 
m. With a cartilaginous margin. 
b. Paleae harsh, dark, narrow 
b 1. Paleae thin, light-brown, broad 
2. E. beccarianum. 
3 E. Iaurifolium. 
1. E. petiolatum (Sw.) Urban. 
Acrostichum viscosum Sw. 
Dutch Borneo, North Borneo. 
Almost pantropicah 
