KEYS TO THE FERNS OF BORNEO 
341 
26 . LINDSAYA Dryander. 
a. Fertile and sterile pinnules alike. 
b. Veins free (unless in sorus), fronds 
pinnate. 
c. Fronds rarely 1 cm. wide. 
d. Terrestrial 
1. L. concinna. 
di. Scanaent 
4. L. gracilis. 
c 1. Fronds usually 2 cm. or more wide. 
d. Fronds densely clustered. 
e. Stipes stramineous 
3. L. crisp a. 
ei. Stipes reddish, at least at base. 
/. Pinnae rounded at apex 
17. L. orbiculata 
/i. Pinnae subacute 
2. L. cnltrata. 
di. Fronds remote or subclustered. 
e. Sori solitary on narrow lobes 
5. L. repens. 
ei. Sori elongate, but interrupted by 
incisions in margin 
6 . L. pectinata. 
£2. Sorus continuous along upper 
margin 
7. L. scandens. 
b 1. 
c. 
Veins free (unless in sorus), fronds 
bipinnate. 
Pinnules very numerous, hardly 5 
mm. wide. 
d. Pinnules entire 
d*-. Pinnules cut 
O. Pinnules much fewer or much larger. 
d. Main vein along lower margin 
d*. Main vein medial or none 
62. Veins anastomosing 
c. Sori marginal (terminal in lobes), 
pinnules incised. 
d. Pinnules subequal toward apex 
d l . Pinnules dimidiate throughout 
ci. Sori marginal, pinnules nearly entire 
c2. Sori submarginal. 
d. Pinnae less than 15 mm. wide 
d 1 . Pinnae more than 20 mm wide 
a 1. Fertile and sterile pinnules unlike 
11. 
9 - 
8 . 
T 7 * 
L. borneensis. 
L. longissima. 
L. lancea. 
L. orbiculata. 
12. 
16. 
14. 
13 - 
15 - 
10. 
L Sarasinovum. 
L. davallioides. 
L. nitida. 
L. Hewittii. 
L. decomposita. 
L. impressa. 
1. L. CONCINNA J. Sm. 
Sarawak, Dutch Borneo and British North Borneo. 
Philippines. 
2 . L. CULTRATA. 
Common. 
Malaya to Queensland and Madagascar. 
