352 
KEYS TO THE FERNS OF BORNEO 
45. C. contaminans (Wall.) Copel. 
Sarawak, North Borneo; probably everywhere. 
Malaya to India. 
Our Bornean specimens have the costules and veins 
hairy beneath. 
31. DIACALPE Blume. 
D. ASPIDIOIDES Bl. 
Kinabalu. 
Malaya. 
32 . ACROPHORUS Presl. 
A. stipellatus (Wall.) Moore. 
Dutch Borneo, Kinabalu. 
Malaya to India. 
33. MONACHOSORUM Kunze. 
M. SUBDIGITATUM (Bl.) Kuhn. 
Kinabalu. 
Malaya to India. 
34. DRYOPTERIS Adanson. 
Subgenus I. 
opteris.) 
Veins free, sort roundish (Eudry- 
Lastreea. 
a. Fronds tripinnatifid at the base. 
b. Rachis not naked 
bi. Rachis naked. 
c. Frond herbaceous 
a. Frond coriaceous 
fli. Well developed fronds tripinnate. 
b. Tripinnate at base only. 
c. Rachis naked or nearly so. 
d. Stipe naked except at very base 
d1. Stipe scaly in lower part 
Rachis scaly 
I*. More freely tripinnate or quadripin- 
natifid. 
c. Rachis densely clothed with dark, 
squamose scales 
ci. Rachis not densely scaly. 
d. Veins not hairy. 
1. D. sarawakensis . 
2. D. dissecta. 
3. D. subsagenioides „ 
4. D. glabrior. 
5. D. sparsa. 
6. D. aciculata. 
7. D. multiseta. 
