408 
KEYS TO THE FERNS OF BORNEO 
b. Fronds linear 
3. L. parallel a 
bi. Fronds oblanceolate. 
c. Abruptly contracted to short petiole 
o. Narrowed gradually to base. 
4. L. Forbesii. 
d. Costa more prominent above 
di. Costa more prominent below 
5. L. blumeana. 
6. L. involnta. 
1. L. CONFERTA Copel. 
Sarawak (Mt. Merinjak). 
Mindanao. 
2. L. iridifolia (Christ) Copel. 
L. ensifrons v. A. v. R. 
Sarawak, North Borneo. 
Celebes, Mindanao. 
3. L. parallela Copel. 
Kinabalu. 
Luzon. 
The Kinabalu plant is exceptionally large but not 
otherwise distinguishable. 
4. L. Forbesii. 
Sarawak (foot of Mt. Murud); Kinabalu : 
Sumatra. 
5. L. blumeana Presl. 
Common. 
Malaya; Japan? 
6. L. involuta (Bl.) Presl. 
Sarawak, Dutch Borneo; the var. gigas on Kinabalu. 
Malaya to India, China and Melanesia ; the variety, 
in Luzon. 
61. CYCLOPHORUS Desvaux. 
a. Sori in one row on each side of costa 
9. C. angustatus. 
a 1. Sori in plural rows or scattered. 
b. Sterile frond roundish, 1—2 cm. long 
61. Fronds longer and relatively narrower. 
4. C. nwnmularifolius. 
c. Fronds uniform, over 30 cm. long. 
d. Fronds oblanceolate 
ul Fronds linear 
8. C. beddomeanus. 
3. C. acrostichoides. 
