THE PHILIPPINE JOURNAL OF SCIENCE, C. BOTANY. 
Vol. X, No. 2, March, 1915. 
NOTES ON BORNEAN FERNS 
By E. B. COPELAND 
(From the College of Agriculture, University of the Philippines, 
Los Bajos, P. I.) 
ONE PLATE 
A native collector has been employed by the Philippine Bureau 
of Science, through the agency of the Sarawak Museum, during 
the past two years. Among many other Bornean plants received 
from this source are the ferns which are the subject of most 
of the following notes. Numbers which are cited without the 
name of the collector refer to the Sarawak material secured by 
this native collector. 
ANGIOPTERIS BROOKSII Copel. (Plate I.) 
Professor Campbell of Stanford University, while visiting Sarawak in 
1918, collected on Mount Matang simply pinnate and very sparsely bipin- 
nate fronds, all in full fruit, which can be identified positively as Angiopteris 
Brooksii Copel. This seems to be by far the commonest Angiopteris of 
western Sarawak. Photographs of these ferns are shown in the accom- 
panying Plate I. As the plate shows, the frond, when simply pinnate, has 
an articulation at the upper end of the stipe. It would therefore be tech- 
nically more correct to regard this as a bipinnate frond with one pinna. 
The less divided the fronds are, and the smaller the frond as a whole, the 
larger are the individual pinnules. The first impression made by these 
specimens is that they may serve to connect the ordinary Angiopteris, with 
large fronds and small pinnules, with Macroglossum. However, I doubt 
that they are of much value in this respect. The sori seem to be typically 
those of Angiopteris Brooksii. The fronds of young plants of various 
species of Angiopteris are likely to be very divergent from the usual 
Angiopteris type. The first fronds formed are always simple. Angiop- 
teris angustifolia, the common species of central Luzon, sometimes has 
fronds up to half a meter or more in length, which suggest those of Marattia 
more than they do those which the same plants produce when more mature. 
An Angiopteris growing in Hongkong is also notable for the variety of 
fronds produced by plants of about the same size. 
HYMENOPHYLLUM SABINIFOLIUM Hooker. 
No. 981, without locality. 
This occurs also in the Philippines, as well as in Java and Sumatra. 
HYMENOPHYLLUM SEMIFISSUM Copel. sp. nov. 
Rhizomate gracillimo, late repente, minute et sparse 5 Blloso: 
stipitibus remotis, 1-3 cm altis, filiformibus, haud alatis, rach- 
ique sub lente minute et sparse pilosis sub oculo nudo glabris; 
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