372 
KEYS TO THE FERNS OF BORNEO 
26. T. leuzeana (Gaud.) Copel. 
Common. 
Malaya to India, China and Polynesia. 
Indusium fugacious or wanting. 
27. T. devexa (Kze.) Copel. 
Sarawak. 
Malaya to China and Formosa. 
Indusium peltate. 
T. Bakeri v. A. v. R., related to the preceding 
species, is doubtfully reported from Borneo by van 
Alderwerelt. 
41 . HEMIGRAMMA Christ. 
H. latifolia (Meyen) Copel. 
Dutch Borneo. 
Malaya. 
42. STENOSEMIA Presl. 
S. aurita (Sw.) Presl. 
Sarawak, Dutch Borneo. 
Malaya, Solomon Islands. 
43. LEPTOCHILUS Kaulfuss. 
Of the twelve species of this genus reported from 
Borneo, no more than four are represented in our collec¬ 
tions. The genus as at present recognized, and as here 
construed, is not monophyletic, even after the exclusion 
of Lomagramma and Hemigramma. For present purposes, 
I follow van Alderwerelt in keying out the species. 
a. Main veins distinct nearly or quite to the 
margin. 
b. Fronds typically simple and entire. 
c. Only the lowest veinlets anastomosing 1. L. oligodictyus. 
c*. Veins anastomosing freely. 
d. Free veinlets none 2. L. hnnceanus. 
di. Free veinlets present 3. L. decurrens. 
b*. Fronds typically pinnate. 
c. Frond pinnately lobed above the one 
pair of pinnae 4. L. zeylanicus. 
ci. Frond at most sinuate above the few 
pairs of pipnae' 5. L. heteroclituSc 
