366 KEYS TO THE FERNS OF BORNEO 
3* P. ACULEATUM (L.) Schott. 
Kinabalu. 
Pantropic. 
Our Kinabalu collections include three distinct ferns, 
included here under the one old name, partly in conform¬ 
ity to common usage, but chiefly because of the 
difficulty in identifying the forms already described. 
37. DIDYMOCHL^ENA Desvaux. 
D. TRUNCATULA (Sw.) J. Sm. 
Sarawak, Kinabalu. 
Pantropical. 
38. CYCLOPELTIS J. Smith. 
a. Pinnae not strongly auricled 1. C. presliana. 
ai. Pinnae strongly auricled at base 2. C. mirabilis. 
1. C. presliana (J. Sm.) Berkeley. 
Common. 
Malaya to Burma and New Guinea. 
If C. presliana and C. semicordata are regarded as 
distinct species, the latter seems to be exclusively 
American. 
2. C. mirabilis Copel. 
Sarawak (Bidi). 
Local. 
39 . POLYBOTRYA Humboldt and Bonpland. 
a. 
Frond not over 30 cm. long nor over 15 cm. 
wide 
1. P. Nieuwenhuisii 
Frond larger 
2. P. ste?iosemioides. 
I. 
P. Nieuwenhuisii. 
Dutch Borneo. 
Endemic. 
2. P. stenosemioides (Baker) Copel. 
Sarawak (Mt. Matang). 
Reported from Luzon, but unknown to me. 
