KEYS TO THE FERNS OF BORNEO 
367 
40. TECTARIA Cavanilles. 
•a. Frond simple, entire, at least twice as long 
as wide. 
ft. Frond somewhat decurrent, indusia 
conspicuous 
ft*. Stipe conspicuously winged, indusia 
obscure 
a 1. Frond simple, broad, at least the young 
fronds cordate. 
b. All fronds cordate. 
c. Not deeply lobed. 
d. Frond roundish, hairy beneath 
di. Frond ovate, naked 
ci. Palmately lobed. 
d. Sori many, scattered. 
e. Lobes triangular 
ei. Lobes lanceolate 
di. Sori in two rows between the main 
veins 
ft 1 . Fertile fronds not cordate 
a*. Fronds pinnatifid to a winged rachis. 
ft. Sori scattered 
ft 1 . Sori in two rows between the main veins 
.« 3 . Typical fronds ternate, with large, long, 
entire pinnae. 
ft. Rhizome erect 
ft 1 . Rhizome creeping. 
c. Stipe fuscous 
ci. Stipe stramineous 
•at. Typical fronds simply pinnate, pinnae not 
pinnatifid. 
ft. Sori scattered. 
c. Pinnae less than 3 cm. wide. 
d. Pinnae narrowed to base 
d*. Pinnae broad at base 
ci. Pinnae wider. 
d. Midribs brown 
di. Midribs blackish 
ft 1 . Sori in two rows between main veins. 
c. Surfaces finely hairy 
ci. Surfaces naked. 
d. Membranaceous 
di. Texture firmer 
1. T. singaporiana. 
2. T.pteropoda. 
3. T. Labrusca. 
4. T. Broohsii* 
• 
5. T. platanifolia. 
6 . T. tricuspis. 
7. T. palmata. 
14. T. Burberi. 
8 . T. vasta. 
9. T. decurreits. 
10. T. subcaudata. 
11. T. murudensis, 
12. T. ternata. 
13. T. subdigitata. 
14. T. Barberi. 
15. T. polymorpha. 
16. T. angulata. 
17. T. mclanorachis. 
18. T. nuda. 
19. T. crenata. 
* Juvenile T. polymorpha may be keyed out here; its fronds are 
very thin. 
