60 MARTELX.I. 
r w 
1902, from the eight species enumerated in tlie works of Bhinco and 
Vidal, those of the former very douI)tful and imperfectly known, the 
nnmber of species of Fandanm known to occur in tlie Pliilippines lias 
been increased to twenty-three witli several varieties and forms, and tliree 
doubtful species. As, in so a short time, the known number of these 
plants lias been so appreciably multiplied, 1 think it probable that, even 
now, we know not more tlian one-half of the species of Pandaniis actually 
growing in the Archipelago. 
So far as I can judge, giving due consideration to tbe general geo- 
graphical distribution of tbe plants of tbe rhilippines, it seems to me 
possible that several of the species of Fandanus which now appear to be 
endemic in the Philippine Archipelago, may not really be so, but are likely 
to grow also in Borneo, Celebes, or in other neighboring countrres, 
which at the present time are insufficiently explored botanically. The 
numerous specimens of Pandanits collected by recent botanists have 
afforded the means of identifying most of the species too briefly and 
obscurely described by Blanco, which otherwise would iuive reuuiined 
unrecognizable. We are inrlebted especially to Mr. Merrill and Mr. 
Elmer, for having, in their explorations, given especial attention to 
the rediscovery of Blanco's species. 1 have also been able to identify, 
with the help of the recently collected material, a few specimens of 
Philippine Pandaniis, from older collections which were preserved in 
various European herbaria without any leference to their origin or 
collectors. 
I wish to acknowledge my especial indebteihicss to ^Ir. E. D. Merrill, 
who has rendered possible this revision of Phiiii)pine Pandaniif<, by the 
generous loan of the entire collection of this group of plants contained 
in the herbarium of the Bureau of Science, and also for having pi-esented 
me with a complete set of his duplicate types. I am also much obliged 
to Mr. A. D. E. Elmer, w^ho has been so good as to send me his specimens 
and to communicate the results of his researches. The specimens cited 
in this paper, unless otherwise stated, are to be found in the herbarium 
of the Bureau of Science, and in my private herbarium. 
§ KEUKA. 
(1) Pandanus Linnaei Gaud. Voy. Bonite (1844) t. 12, f. 1-8. 
Arbuscula 2-4: m alta, basi non vel vix radicans (Merrill). Folia 
l.()-1.8 ni longa, 7 cm lata, basi non dilatata, apicem versus gradatim 
longe angusteqiu' acuminato-attenuata, supra sublevis et nitida, subtus 
glauca, crebre et minutissime longitudinaliter nervosa, marginibus (ima 
batfi excepta) crebre dentato-serratis, dentibus subulatis, longiusculis, 
crecto-patentibus; costa media prominenti acuta spinis parvis, subulatis, 
inferioribus retroflexis munita. Syncarpium solitarium, magnum, glo- 
boso-oblongum, \Tride, pendulum, longe et valide pedunculatum. 
Phalanges nunierosae (55 e Merrill), 7.5 cm longae, obcoiucae, basi 
