KEYS TO THE FERNS OF BORNEO 
375 
rfi. Stipe ebeneous 
rt'2. Stipe neither clear-black nor reddish. 
e. Paleae black 
ci. Paleae brownish 
b*. Pinnules cut about half-way to costa. 
c. Pinnules hardly 3 cm long 
ci. Pinnules more than 5 cm. long. 
d. Rachis naked or nearly so 
di. Rachis clothed with narrow scales 
62. Freely bipinnate, but pinnules cut less 
than half way to costa. 
c. Pinnules oblique at base 
ci. Pinnules nearly equal-sided. 
d. Pinnules 15-40 mm. wide 
di. Pinnules 6-10 mm. wide 
1 > 3 . Pinnae deeply lobed or barely pinnate at 
base. 
c. Stine clothed throughout with thin 
scales 
ci. Stipe naked above. 
d. Pinnae fleshy 
di. Pinnae not fleshy. 
e. Lowest pinnae short stalked (less 
than 1 cm.). 
/. Pinnae at most about 5 cm. long 
fi. Pinnae much longer. 
g. Lobes straight, nearly hori¬ 
zontal 
gi. Lobes oblique, subfalcate 
ei. Lowest pinnae long-stalked (more 
than 1 cm.). 
/. Lowest pinnae not dilated 
fi. Lowest pinnae wide. 
g. Stipe smooth 
gi. Stipe muricate 
b\. Freely pinnate, but pinnae not lobed 
beyond middle unless it be for a basal 
auricle. 
c. Most of the sori roundish 
ci. Sori elongate, pinnae equal-sided at 
base. 
d. Apex pinnatifid 
di. Terminal pinna like others. 
£2. Sori elongate, pinnae unequal-sided at 
base. 
d. Apex pinnatifid. 
e. Pinnae (except on young plants) 
toothed or lobed. 
/. Sori oblique to costule 
fi. Sori oblique to costa 
6. A . Moultoni. 
7. A . atrosquamosum. 
8 . A. Blitmei. 
10. A . Heivittii . 
11. A . paripinnatum . 
12. A. vestitnm. 
13. A. matangense . 
14. A. maximum. 
17. A. sarawahense. 
1 . A . biseriale. 
16. A. carnosum . 
25. A. tomentosum. 
18. A. sorsogonense. 
iq. A. Christii. 
22. A.polycarpum. 
20. A . cyatheifolium. 
21. A . muricatvm. 
2. A . macrocarpon. 
24. A. aquibasale . 
28. A. xiplwphylhim. 
23. A. petiolare. 
26. A . crenato-sevratum . 
G 
