324 
KEYS TO THE FERNS OF BORNEO 
c Lowest pinnules of each pinna remote 
from others and stipule-like 
a. Lowest pinnules not stipule-like. 
d. Real (inner) indusium present, open¬ 
ing toward margin. 
e. Main rachis zigzag 
fi. Main rachis straight 
rfi Sporangia protected only by reflexed 
margin. 
e. Vein-tips connected in thesorusby 
a marginal vein 
£ i. Veins free, but sori confluent at 
maturity 
c2 , Veins free, and sori separate and 
distinct. 
16. Histiopteris. 
14. Paesia. 
15. Pteridium. 
17. Pteris. 
11. Chilanthes*. 
13. Hypolepis , 
1. CIBOTIUM Kaulfuss. 
C. Barometz (L.) J Sm. 
Sarawak, Kinabalu. 
Malaya to Assam and China. 
The Kinabalu form is the same as that found in the 
Philippines (C. Cumingii Kze). 
2. DENNSTiEDTIA Bernhardi. 
a. Frond tripinnate 
an Frond quadripinnate 
b. Frond erect or drooping 
In. Frond scandent or twining 
1. D. ampla (Baker) Bedd. 
Sarawak. 
Malacca. 
2. D. cuneata (J. Sm.) Moore. 
Sarawak, Kinabalu. 
Philippines. 
It is not worth while to try to distinguish the “ var. 
obtusa .” 
3. D. gomphophylla (Baker) C. Chr. 
Sarawak (Mt. Matang). 
Endemic. 
1. D. ampla . 
2. D. cuneata. 
2. D. gomphophylla. 
* Doryopteris, with deeply lobed simple fronds, and Onychiutn, 
with narrow ultimate pinnules almost covered by the indusia, are likely 
to be found in Borneo. Their numbers would be 11A and 17A. 
