368 
KEYS TO THE FERNS OF BORNEO 
a, 5 . Lowest pinnae forked to the base orternate, 
pinnae-and pinnules entire. 
b. Sori in rows 20. T. stenophylla. 
b*. Sori scattered. 
c Free included veinlets present 21. T. semibipinnata. 
Without free included veinlets 22. T. Lobbii. 
a 6 . Pinnae pinnatifid or compound. 
b. Veins uniting freely, or areolae several 
rows. 
c. Frond herbaceous, lowest pinnae not 
dilated 
23 - 
T. gigantea. 
£i. Frond firm in texture, lowest pinnae 
dilated. 
d. Indusia present 
24. 
T. malayensis. 
d*. Indusia- absent 
25 - 
T. irregularis. 
b 1 . Veins free except along main veins. 
c. Usually over 1 m high, texture firm 
26. 
T. leuzeana. 
o 1 . Usually under 30 cm high, membrana¬ 
ceous 
27. 
T. dev ex a. 
1. T. singaporiana (Wall.) Copel. 
Aspidium, Wall.; Hook and Grev., leones Fit. t,. 
29, 1827. 
Sarawak (Mt. Matang), Labuan or Kinabalu. 
Malaya to China. 
Indusia peltate. 
2. T. pteropoda (Baker) Copel. 
Nepkrodium, Baker,/, of Bot. 26 (1888) 325. 
Sarawak, Dutch Borneo. 
Endemic. 
Indusia minute, obscure. 
3. T. labrusca (Hooker) Copel. 
Sarawak, Dutch Borneo. 
Endemic. 
Indusium wanting. 
I cannot distinguish Sagenia vitis Racib. 
4. T. Brooksii Copel. 
Sarawak (Bidi). 
Endemic. 
Indusium wanting. 
