oe ,- aller 
LEAFLETS OF PHILIPPINE BOTANY 
EDITED BY A. D. E. ELMER, A. M. 
- Vol. Il. Manila, P. I., October `30, 1908. Art. 19. 
PTERIDOPHYTES OF THE HORN OF NEGROS 
BY 
E. B. COPELAND. 
( Bureau of Education, Manila, P. I.) 
The Horn of Negros is à mountain somewhat more than 
1800 m. in height, situated at the extreme southern end of 
the island whose name it bears. Although surpassed in height 
by many mountains in the Philippines, it receives the winds 
from both the Pacifie and the Sulu sea before they have lost 
their moisture, and has, accordingly, a very wet climate. Mr. 
Elmer svates that its woods are the most humid in which he 
has ever collected. He collected there from March to June of this 
year, 1908. As he brought back about 180 species of Pter- 
idophytes, the collection must give a fairly good picture of 
the group as represented on the mountain, and it therefore 
seems worth while to publish | a complete list of his species. 
In this collection are fourteen species which seem to 
be hitherto unknown, and three less distinct forms which 
are here described as varieties. Of the new species, three 
 Athyria have just been described in my revision of that genus, 
and four Hymenophyllaceae are held for more complete study 
and comparison. 
The strongest impression’ made by the study of this col- 
lection is that of the striking unity of the fern flora of the 
whole Archipelago. Although this collection seems to include 
